Add chained TRB support to ep0. Now TRB's can be chained just by
invoking _dwc3_ep0_start_trans_ with 'chain' parameter set to true.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
We have a "Enabling %s" trace when enabling an endpoint
but that message felt lonely without a matching
"Disabling %s". Add it.
Signed-off-by: Felipe Balbi <balbi@ti.com>
In case of non-Isochronous transfers, we don't
want to clear DWC3_EP_BUSY flag until XferComplete
event. That's because XferInProgress was only enabled
so we can recycle TRBs and usb_requests quicker, but
there are still other pending requests being transferred.
In order to make sure we don't allow for another StartTransfer
command while the HW is still processing other transfers,
we must keep DWC3_EP_BUSY flag set and this what this patch
does.
Fixes: f3af36511e (usb: dwc3: gadget: always enable IOC on
bulk/interrupt transfers)
Cc: <stable@vger.kernel.org> # v3.15+
Reported-by: sundeep subbaraya <sundeep.lkml@gmail.com>
Tested-by: sundeep subbaraya <sundeep.lkml@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
We need to return error to caller if command is not sent to
controller succesfully.
Signed-off-by: Subbaraya Sundeep Bhatta <sbhatta@xilinx.com>
Fixes: 72246da40f (usb: Introduce DesignWare USB3 DRD Driver)
Cc: <stable@vger.kernel.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
We need to return error to caller if command is not sent to
controller succesfully.
Signed-off-by: Subbaraya Sundeep Bhatta <sbhatta@xilinx.com>
Fixes: b09bb64239 (usb: dwc3: gadget: implement Global Command support)
Cc: <stable@vger.kernel.org> #v3.5+
Signed-off-by: Felipe Balbi <balbi@ti.com>
Now that we're using XFERINPROGRESS for all endpoint
types (except Control), we will *always* be completing
one TRB at a time, so it's safe to remove the loop
from dwc3_cleanup_done_reqs.
Signed-off-by: Felipe Balbi <balbi@ti.com>
Delete private selfpowered variable, and use common one.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
commit 8e74475b0e (usb: dwc3: gadget: use udc-core's
reset notifier) added support for the new UDC core's
reset notifier to dwc3 but while at it, it removed
a spin_lock() from dwc3_reset_gadget() which might
cause an unbalanced spin_unlock() further down the line
Fixes: 8e74475b0e (usb: dwc3: gadget: use udc-core's reset notifier)
Cc: <stable@vger.kernel.org> # v3.19
Signed-off-by: Felipe Balbi <balbi@ti.com>
if an unknown IRQ event is triggered, that means
the HW is really misbehaving. Instead of printing
a debug message, let's WARN() so users report
when that happens.
Signed-off-by: Felipe Balbi <balbi@ti.com>
DWC3 gadget sets up a pool of 32 TRBs for each EP during initialization. This
means, the max TRBs that can be submitted for an EP is fixed to 32. Since the
request queue for an EP is a linked list, any number of requests can be queued
to it by the gadget layer. However, the dwc3 driver must not submit TRBs more
than the pool it has created for. This limit wasn't respected when SG was used
resulting in submitting more than the max TRBs, eventually leading to
non-transfer of the TRBs submitted over the max limit.
Root cause:
When SG is used, there are two loops iterating to prepare TRBs:
- Outer loop over the request_list
- Inner loop over the SG list
The code was missing break to get out of the outer loop.
Fixes: eeb720fb21 (usb: dwc3: gadget: add support for SG lists)
Cc: <stable@vger.kernel.org> # v3.9+
Signed-off-by: Amit Virdi <amit.virdi@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
When scatter gather (SG) is used, multiple TRBs are prepared from one DWC3
request (dwc3_request). So while preparing TRBs, the 'last' flag should be set
only when it is the last TRB being prepared from the last dwc3_request entry.
The current implementation uses list_is_last to check if the dwc3_request is the
last entry from the request_list. However, list_is_last returns false for the
last entry too. This is because, while preparing the first TRB from a request,
the function dwc3_prepare_one_trb modifies the request's next and prev pointers
while moving the URB to req_queued. Hence, list_is_last always returns false no
matter what.
The correct way is not to access the modified pointers of dwc3_request but to
use list_empty macro instead.
Fixes: e5ba5ec833 (usb: dwc3: gadget: fix scatter gather implementation)
Signed-off-by: Amit Virdi <amit.virdi@st.com>
Cc: <stable@vger.kernel.org> # v3.9+
Signed-off-by: Felipe Balbi <balbi@ti.com>
dwc3_gadget_init_hw_endpoints calls dwc3_alloc_trb_pool only if epnum is not
equal to 0 or 1. Hence, rechecking it in the called function is redundant.
Signed-off-by: Amit Virdi <amit.virdi@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Replace usb_gadget_driver's disconnect with udc-core's reset notifier at
bus reset handler.
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
HIRD threshold should be configurable by different platforms.
From DesignWare databook:
When HIRD_Threshold[4] is set to 1b1 and HIRD value is greater than or
equal to the value in HIRD_Threshold[3:0], dwc3 asserts output signals
utmi_l1_suspend_n to put PHY into Deep Low-Power mode in L1.
When HIRD_Threshold[4] is set to 1b0 or the HIRD value is less than
HIRD_Threshold[3:0], dwc3 asserts output signals utmi_sleep_n on L1.
Signed-off-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
When parameter DWC_USB3_LPM_ERRATA_ENABLE is enabled in Andvanced
Configuration of coreConsultant, it supports of xHCI BESL Errata Dated
10/19/2011 is enabled in host mode. In device mode it adds the capability
to send NYET response threshold based on the BESL value received in the LPM
token, and the threhold is configurable for each soc platform.
This patch adds an entry that soc platform is able to define the lpm
capacity with their own device tree or bus glue layer.
[ balbi@ti.com : added devicetree documentation, spelled threshold
completely, made sure threshold is only applied to
proper core revisions. ]
Signed-off-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
now that no UDC driver relies on the extra
'driver' argument to ->udc_stop(), we can
safely remove it.
This commit is based on previous work by
Robert Baldyga <r.baldyga@samsung.com> which
can be found at [1]; however that patch turned
out to have a high probability of regressing
many UDC drivers because of a blind search & replace
s/driver/$udc->driver/ which caused the 'driver'
argument to stop_activity() to be a valid non-NULL
pointer when it should be NULL, thus causing UDCs
to mistakenly call gadget driver's ->disconnect()
callback.
[1] http://markmail.org/message/x5zneg4xea4zntab
Acked-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Some gadget/function drivers might want to do
improper request recycling by allocating a single
request from one particular endpoint and queueing
it to another completely unrelated endpoint.
One such case was found with f_loopback.c.
To prevent such cases from happening again, let's
WARN() so we get a loud enough failure and persuade
users to report errors.
Signed-off-by: Felipe Balbi <balbi@ti.com>
whenever we get a Disconnect Interrupt, we should
make sure to update out udc state to NOT_ATTACHED,
otherwise sysfs will show wrong values.
Signed-off-by: Felipe Balbi <balbi@ti.com>
Using ->prepare()/->complete() to mask/unmask
IRQs is wrong at least for dwc3. We need to
make sure that by the end of ->resume(), IRQs
are working and ready to fire because a child
device may need working IRQs for its own ->resume()
method.
Signed-off-by: Felipe Balbi <balbi@ti.com>
On ISOC endpoints the last trb_pool entry used as a
LINK TRB is not getting zeroed out correctly due to
memset being called incorrectly and in the wrong place.
If pool allocated from DMA was not zero-initialized
to begin with this will result in the size and ctrl
values being random garbage. Call memset correctly after
assignment of the trb_link pointer.
Fixes: f6bafc6a1c ("usb: dwc3: convert TRBs into bitshifts")
Cc: <stable@vger.kernel.org> # v3.4+
Signed-off-by: Jack Pham <jackp@codeaurora.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
According to our Gadget Framework API documentation,
->set_halt() *must* return -EAGAIN if we have pending
transfers (on either direction) or FIFO isn't empty (on
TX endpoints).
Fix this bug so that the mass storage gadget can be used
without stall=0 parameter.
This patch should be backported to all kernels since v3.2.
Cc: <stable@vger.kernel.org> # v3.2+
Suggested-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Instead of releasing the lock and calling locked
versions of our set_halt() methods, let's hold
the lock all the way through and call unlocked
versions of those functions.
Signed-off-by: Felipe Balbi <balbi@ti.com>
__dwc3_gadget_ep_set_halt() is the function which
handles the actual halt feature. In order to cope
with some extra cleanup comming as a follow-up patch
let's move the isochronous endpoint check there too.
Signed-off-by: Felipe Balbi <balbi@ti.com>
Use the recently introduced usb_gadget_giveback_request() in favor of
direct invocation of the completion routine.
All places in drivers/usb/ matching "[-.]complete(" were replaced with a
call to usb_gadget_giveback_request(). This was compile-tested with all
ARM drivers enabled and runtime-tested for musb.
Signed-off-by: Michal Sojka <sojka@merica.cz>
Acked-by: Felipe Balbi <balbi@ti.com>
Tested-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
When we're debugging hard-to-reproduce and time-sensitive
use cases, printk() poses too much overhead. That's when
the kernel's tracing infrastructure comes into play.
This patch implements a few initial tracepoints for the
dwc3 driver. More traces can be added as necessary in order
to ease the task of debugging dwc3.
Reviewed-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Those functions are only using within debugging
messages, grouping them into debug.h makes sense.
While at that, also add missing multiple inclusion
guard.
Signed-off-by: Felipe Balbi <balbi@ti.com>
After commit 2ec2a8be (usb: dwc3: gadget:
always enable IOC on bulk/interrupt transfers)
we created a situation where it was possible to
hang a bulk/interrupt endpoint if we had more
than one pending request in our queue and they
were both started with a single Start Transfer
command.
The problems triggers because we had not enabled
Transfer In Progress event for those endpoints
and we were not able to process early giveback
of requests completed without LST bit set.
Fix the problem by finally enabling Xfer In Progress
event for all endpoint types, except control.
Fixes: 2ec2a8be (usb: dwc3: gadget: always
enable IOC on bulk/interrupt transfers)
Cc: <stable@vger.kernel.org> # v3.14+
Reported-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
dep->endpoint.desc is checked at the beginning of
dwc3_gadget_ep_queue(), but after that it may be set to NULL
by another thread and then accessed again in dwc3_gadget_ep_queue().
This will lead to kernel oops.
Expand spinlock protection area to aviod race condition.
Signed-off-by: Zhuang Jin Can <jin.can.zhuang@intel.com>
Signed-off-by: Jiebing Li <jiebing.li@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
The site-specific OOM messages are unnecessary, because they
duplicate the MM subsystem generic OOM message.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Surprisingly enough, while a big set of patches, the majority is
composed of cleanups (using devm_*, fixing sparse errors, moving
code around, adding const, etc).
The highlights are addition of new support for PLX USB338x devices,
and support for USB 2.0-only configurations of the DWC3 IP core.
Signed-of-by: Felipe Balbi <balbi@ti.com>
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Merge tag 'usb-for-v3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next
Felipe writes:
usb: patches for v3.17 merge window
Surprisingly enough, while a big set of patches, the majority is
composed of cleanups (using devm_*, fixing sparse errors, moving
code around, adding const, etc).
The highlights are addition of new support for PLX USB338x devices,
and support for USB 2.0-only configurations of the DWC3 IP core.
Signed-of-by: Felipe Balbi <balbi@ti.com>
Remove 'start_new' variable from dwc3_endpoint_transfer_complete(),
since this variable has not been used.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
In ISOC transfers, when free_slot points to the last TRB (i.e. Link
TRB), and all queued requests meet Missed Interval Isoc error, busy_slot
points to trb0.
busy_slot->trb0
trb1
...
free_slot->trb31(Link TRB)
After end transfer and receiving the XferNotReady event, trb_left is
caculated as 1 which is wrong, and no TRB will be primed to the
endpoint.
The root cause is free_slot is not increased the same way as busy_slot.
When busy_slot is increased by one, it checks if points to a link TRB
after increasement, but free_slot checks it before increasement.
free_slot should behave the same as busy_slot to make the trb_left
caculation correct.
Reviewed-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Zhuang Jin Can <jin.can.zhuang@intel.com>
Signed-off-by: Jiebing Li <jiebing.li@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Not a lot here during this merge window. Mostly we just have
the usual miscellaneous patches (removal of unnecessary prints,
proper dependencies being added to Kconfig, build warning fixes,
new device ID, etc.
Other than those, the only important new features are the
new support for OS Strings which should help Linux Gadget
Drivers behave better under MS Windows. Also Babble Recovery
implementation for MUSB on AM335x. Lastly, we also have
ARCH_QCOM PHY support though phy-msm.
Signed-of-by: Felipe Balbi <balbi@ti.com>
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Merge tag 'usb-for-v3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next
Felipe writes:
usb: patches for v3.16 merge window
Not a lot here during this merge window. Mostly we just have
the usual miscellaneous patches (removal of unnecessary prints,
proper dependencies being added to Kconfig, build warning fixes,
new device ID, etc.
Other than those, the only important new features are the
new support for OS Strings which should help Linux Gadget
Drivers behave better under MS Windows. Also Babble Recovery
implementation for MUSB on AM335x. Lastly, we also have
ARCH_QCOM PHY support though phy-msm.
Signed-of-by: Felipe Balbi <balbi@ti.com>
Conflicts:
drivers/usb/phy/phy-mv-u3d-usb.c
First usage of ret variable will re-write initial value. Thus, there is no need
to initialize it.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
this makes it slightly easier to read generic CMD
logs. It also helps make sure we're sending proper
parameters for each command.
Signed-off-by: Felipe Balbi <balbi@ti.com>
so it seems like DWC3 IP doesn't clear stalls
automatically when we disable an endpoint, because
of that, we _must_ make sure stalls are cleared
before clearing the proper bit in DALEPENA register.
Cc: <stable@vger.kernel.org> # v3.4+
Reported-by: Johannes Stezenbach <js@sig21.net>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Make dwc3_gadget_resize_tx_fifos() iterate only over IN
endpoints that are actually present, based on the
num_in_eps parameter. This terminates the loop so as to
prevent dereferencing a potential NULL dwc->eps[i] where
i >= (num_in_eps + num_out_eps).
Signed-off-by: Jack Pham <jackp@codeaurora.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
We know what "value" is and it upsets static checkers that we appear to
have doubts about it.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
These were cut and paste from the ->disconnect function.
Fixes commit 30d577b9bcc4 ('usb: dwc3: gadget: call gadget driver's
->suspend/->resume')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
When going into bus suspend/resume we _must_
call gadget driver's ->suspend/->resume callbacks
accordingly. This patch implements that very feature
which has been missing forever.
Signed-off-by: Felipe Balbi <balbi@ti.com>
It's not always we need to force a transfer to be removed
from the core's internal cache. This extra argument will
help differentiating those two cases.
Signed-off-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
During superspeed, HIRD threshold should always
be zero. Curent driver wasn't making sure that
was the case.
Signed-off-by: Felipe Balbi <balbi@ti.com>
if we have hibernation configured, Databook
instructs us to set KEEP_CONNECT bit together
with RUN_STOP bit, in step 9 of section 12.3.6.1
Initialization for Hibernation Support.
Signed-off-by: Felipe Balbi <balbi@ti.com>
That argument will be used in later patches when we
have working hibernation support. For now, always
pass it as false.
The idea of this patch is to decrease to size of
following patches and slowly add hibernation building
blocks to the gadget side of dwc3 so that it becomes
very easy to review the actual hibernation code.
[ balbi@ti.com : rewrote patch on top of current
tree. Added commit log. ]
Signed-off-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This function will be used during hibernation to get
the current link state. It will be needed at least
for Hibernation support.
Signed-off-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Revision 2.20a of the core has a known issue
which would generate bogus hibernation events
_and_ random failures on USB CV TD.9.23 test
case.
The suggested workaround is to ignore hibernation
events which don't match currently connected
speed.
Signed-off-by: Felipe Balbi <balbi@ti.com>
by setting IOC always, we can recycle TRBs a
lot sooner at the expense of some increased
CPU load.
The extra load seems to be quite minimal on
OMAP5 devices (instead of 1 IRQ for one MSC
transfer, we get
CONFIG_USB_GADGET_STORAGE_NUM_BUFFERS).
Signed-off-by: Felipe Balbi <balbi@ti.com>
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Merge tag 'v3.13-rc4' into next
Linux 3.13-rc4
* tag 'v3.13-rc4': (1001 commits)
Linux 3.13-rc4
null_blk: mem garbage on NUMA systems during init
radeon_pm: fix oops in hwmon_attributes_visible() and radeon_hwmon_show_temp_thresh()
Revert "selinux: consider filesystem subtype in policies"
igb: Fix for issue where values could be too high for udelay function.
i40e: fix null dereference
ARM: fix asm/memory.h build error
dm array: fix a reference counting bug in shadow_ablock
dm space map: disallow decrementing a reference count below zero
mm: memcg: do not allow task about to OOM kill to bypass the limit
mm: memcg: fix race condition between memcg teardown and swapin
thp: move preallocated PTE page table on move_huge_pmd()
mfd/rtc: s5m: fix register updating by adding regmap for RTC
rtc: s5m: enable IRQ wake during suspend
rtc: s5m: limit endless loop waiting for register update
rtc: s5m: fix unsuccesful IRQ request during probe
drivers/rtc/rtc-s5m.c: fix info->rtc assignment
include/linux/kernel.h: make might_fault() a nop for !MMU
drivers/rtc/rtc-at91rm9200.c: correct alarm over day/month wrap
procfs: also fix proc_reg_get_unmapped_area() for !MMU case
...
Signed-off-by: Felipe Balbi <balbi@ti.com>
This patch adds "maxpacket_limit" to struct usb_ep. This field contains
maximum value of maxpacket supported by driver, and is set in driver probe.
This value should be used by autoconfig() function, because value of field
"maxpacket" is set to value from endpoint descriptor when endpoint becomes
enabled. So when autoconfig() function will be called again for this endpoint,
"maxpacket" value will contain wMaxPacketSize from descriptior instead of
maximum packet size for this endpoint.
For this reason this patch adds new field "maxpacket_limit" which contains
value of maximum packet size (which defines maximum endpoint capabilities).
This value is used in ep_matches() function used by autoconfig().
Value of "maxpacket_limit" should be set in UDC driver probe function, using
usb_ep_set_maxpacket_limit() function, defined in gadget.h. This function
set choosen value to both "maxpacket_limit" and "maxpacket" fields.
This patch modifies UDC drivers by adding support for maxpacket_limit.
Signed-off-by: Robert Baldyga <r.baldyga@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
DWC3 requires epout to have buffer size aligned to MaxPacketSize value.
This patch sets necessary quirk for it.
Signed-off-by: David Cohen <david.a.cohen@linux.intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
The dwc3 UDC driver doesn't implement endpoint wedging correctly.
When an endpoint is wedged, the gadget driver should be allowed to
clear the wedge by calling usb_ep_clear_halt(). Only the host is
prevented from resetting the endpoint.
This patch fixes the implementation.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Tested-by: Pratyush Anand <pratyush.anand@st.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
If dwc3_gadget_init_endpoint() fails after allocate some of the eps, we
need to free their memory to avoid leak.
Signed-off-by: David Cohen <david.a.cohen@linux.intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
that function isn't really processing any event
buffer, rather just checking whether it contains
events to be processed.
Due to that reason, we're reaning it to dwc3_check_event_buf()
instead.
Signed-off-by: Felipe Balbi <balbi@ti.com>
We can make use of bit 31 of the GEVNTSIZ(n)
registers to mask/unmask interrupts from that
particular interrupter.
With that feature, we can easily drop IRQF_ONESHOT
from our driver which makes it possible to
properly change IRQ priorities when using RT
patchset *and* it allows us to make use of the
scheduler to choose the proper time to handle
this IRQ thread.
Signed-off-by: Felipe Balbi <balbi@ti.com>
that way we get debugging information when
enabling verbose debug of the driver.
It will be no-op otherwise.
Signed-off-by: Felipe Balbi <balbi@ti.com>
by moving that dev_vdbg() to the internal
__dwc3_gadget_ep_enable() we get the print
even when enable ep0, which calls the internal
function directly.
Signed-off-by: Felipe Balbi <balbi@ti.com>
Recent versions of the core, can suspend and resume
the PHYs automatically, so we don't need to fiddle
with dwc3's Global PHY registers at all.
On versions prior to 1.94a this patch will mean
that we will never ask dwc3 to suspend the PHY.
This is an acceptable behavior or such old versions
of the core, specially considering that the only
chip known to have a version prior to 1.94a was
OMAP5 ES1.0 and that's not supported in mainline
kernel, because it was just a test spin of OMAP5.
Signed-off-by: Felipe Balbi <balbi@ti.com>
in order to allow different instances of the
core work in different maximum speeds, we will
move the maximum_speed module_parameter to
both DeviceTree (making use the new maximum-speed
DT property) and platform_data.
Signed-off-by: Felipe Balbi <balbi@ti.com>
This is a Linux-only driver which makes use
of GPL-only symbols. It makes no sense to
maintain Dual BSD/GPL licensing for this driver.
Considering that the amount of work to use this
driver in any different operating system would likely
be as large as developing the driver from scratch and
considering that we depend on GPL-only symbols, we
will switch over to a GPL v2-only license.
Cc: Anton Tikhomirov <av.tikhomirov@samsung.com>
Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
We cannot request an IRQ with spinlocks held
as that would trigger a sleeping inside
spinlock warning.
Cc: <stable@vger.kernel.org> # v3.10
Reported-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
In case we fail our ->udc_start() callback, we
should be ready to accept another modprobe following
the failed one.
We had forgotten to clear dwc->gadget_driver back
to NULL and, because of that, we were preventing
gadget driver modprobe from being retried.
Cc: <stable@vger.kernel.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
we never allocate a TRB pool for physical endpoints
0 and 1 so trying to free it (a invalid TRB pool pointer)
will lead us in a warning while removing dwc3.ko module.
In order to fix the situation, all we have to do is skip
dwc3_free_trb_pool() for physical endpoints 0 and 1 just
as we while deleting endpoints from the endpoints list.
Cc: stable@vger.kernel.org
Signed-off-by: George Cherian <george.cherian@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
In DWC3 versions < 2.50a configured without
Hibernation mode enabled, there will be an
extra link status change interrupt if device
detects host-initiated U3 exit.
In that case, core will generate an unnecessary
U3 -> RESUME transition which should be ignored
by the driver.
Signed-off-by: Felipe Balbi <balbi@ti.com>
by moving to threaded IRQs, we allow our IRQ
priorities to be configurable when running with
realtime patch. Also, since we're running in
thread context, we can call functions which
might sleep, such as sysfs_notify() without
problems.
Signed-off-by: Felipe Balbi <balbi@ti.com>
Add support for basic power management on
the dwc3 driver. While there is still lots
to improve for full PM support, this minimal
patch will already make sure that we survive
suspend-to-ram and suspend-to-disk without
major issues.
Cc: Vikas C Sajjan <vikas.sajjan@linaro.org>
Tested-by: Vivek Gautam <gautam.vivek@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This will be used during resume to verify
if we should reconnect our pullups or not.
Tested-by: Vivek Gautam <gautam.vivek@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
we don't need to enable IRQs until we have
a gadget driver loaded and ready to work,
so let's delay IRQ enable to ->udc_start()
and IRQ disable to ->udc_stop().
While at that, also move the related use of
request_irq() and free_irq().
Tested-by: Vivek Gautam <gautam.vivek@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
We don't need the ->register_my_device flag
anymore because all UDC drivers have been
properly converted.
Let's remove every history of it.
Signed-off-by: Felipe Balbi <balbi@ti.com>
the params variables on dwc3_gadget_conndone_interrupt()
is only memset() to zero but never used in
that function, so we can safely drop the variable
and memset() call.
Signed-off-by: Felipe Balbi <balbi@ti.com>
First of all, that 28 value makes no sense as
HIRD threshold is a 4-bit value, second of all
it's causing issues for OMAP5.
Using 12 because commit cbc725b3 (usb: dwc3:
keep default hird threshold value as 4b1100)
had the intention of setting the maximum allowed
value of 0xc.
Also, original code has been wrong forever, so
this should be backported as far back as
possible.
Cc: <stable@vger.kernel.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
I am not sure, why I found it during SG debugging. But, I noticed that
even when req_queued list was empty, there were some request in
request_list having queued flag true. If I run test second time, it
first removes all request from request_list and hence busy_slot was
wrongly incremented.
Cc: <stable@vger.kernel.org>
Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
To work with scatter gather properly, fixes have been done in number of
functions. I will explain requirement of each fixes one by one.
start_slot: used to retrieve all request of SG during cleanup
dwc3_gadget_giveback: We need to skip link TRB if it was one of the
intermediate TRB of SG.
dwc3_prepare_one_trb: We need to track all submitted TRBs during
cleanup. Since, all TRBs would be serially allocated, so we can just
keep starting slot info and we can always find rest of them. We need to
pass sg node number, so that we cab appropriately program ISOC_FIRST/ISOC,
Chain etc.
dwc3_prepare_trbs: last_one should be set when it is last node
of SG as well as last node of request_list.
__dwc3_cleanup_done_trbs: It has been prepared after re-factorization of
dwc3_cleanup_done_reqs. It is called for each TRB of SG.
Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
UPDATE_TRANSFER does not need any parameters. So, no need to prepare it.
Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
When we reach to link trb, we just need to increase free_slot and then
calculate TRB. Return is not correct, as it will cause wrong TRB DMA
address to fetch in case of update transfer.
Cc: <stable@vger.kernel.org>
Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
There were still some corner cases where isoc transfer was not able to
restart, specially when missed isoc does not happen , and in fact gadget does
not queue any new request during giveback.
Cleanup function calls giveback first, which provides a way to queue
another request to gadget. But gadget did not had any data. So , it did
not call ep_queue. To twist it further, gadget did not queue till
cleanup for last queued TRB is called. If we ever reach this scenario,
we must call END TRANSFER, so that we receive a new xfernotready with
information about current microframe number.
Also insure that there is no request submitted to core when issuing END
TRANSFER.
Cc: <stable@vger.kernel.org> # v3.8
Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Its better to return from each if condition as they are mutually
exclusive.
Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
There are two reasons to generate missed isoc.
1. when the host does not poll for all the data.
2. because of application-side delays that prevent all the data from
being transferred in programmed microframe.
Current code was able to handle first case only. This patch handles
scenario 2 as well.Scenario 2 sometime may occur with complex gadget
application, however it can be easily reproduced for testing purpose as
follows:
a. use isoc binterval as 1 in f_sourcesink.
b. use pattern=0
c. introduce a delay of 150us deliberately in source_sink_complete, so
that after few frames it lands into scenario 2.
d. now run testusb 16 (isoc in test). You will notice that if this
patch is not applied then isoc transfer is not able to recover after
first missed.
Current patch's approach is as under:
If missed isoc occurs and there is no request queued then issue END
TRANSFER, so that core generates next xfernotready and we will issue a
fresh START TRANSFER.
If there are still queued request then wait, do not issue either END or
UPDATE TRANSFER, just attach next request in request_list during giveback.
If any future queued request is successfully transferred then we will issue
UPDATE TRANSFER for all request in the request_list.
Cc: <stable@vger.kernel.org> # v3.6 v3.7 v3.8
Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Synopsys says:
The HIRD Threshold field must be set to ‘0’ when the device core is
operating in super speed mode.
This patch implements above statement.
Cc: <stable@vger.kernel.org> # v3.6 v3.7 v3.8
Acked-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
dwc3_gadget_set_ep_config expects maxburst as incremented by 1. So, by
default initialize ep->maxburst to 1 for ep0.
Cc: <stable@vger.kernel.org>
Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
CONFIG_HOTPLUG is going away as an option so __devinit is no longer
needed.
Signed-off-by: Bill Pemberton <wfp5p@virginia.edu>
Cc: Peter Korsgaard <jacmet@sunsite.dk>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Acked-by: Felipe Balbi <balbi@ti.com>
Cc: Li Yang <leoli@freescale.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Cc: Geoff Levand <geoff@infradead.org>
Cc: Wan ZongShun <mcuos.com@gmail.com>
Cc: Olav Kongas <ok@artecdesign.ee>
Cc: Lennert Buytenhek <kernel@wantstofly.org>
Cc: Ben Dooks <ben-linux@fluff.org>
Cc: Kukjin Kim <kgene.kim@samsung.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
If a USB transfer has already been started, meaning
we have already issued StartTransfer command to that
particular endpoint, DWC3_EP_BUSY flag has also
already been set.
When we try to cancel this transfer which is already
in controller's cache, we will not receive XferComplete
event and we must clear DWC3_EP_BUSY in order to allow
subsequent requests to be properly started.
The best place to clear that flag is right after issuing
DWC3_DEPCMD_ENDTRANSFER.
Cc: stable@vger.kernel.org # v3.4 v3.5 v3.6
Reported-by: Moiz Sonasath <m-sonasath@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This resolves the merge problems with:
drivers/usb/dwc3/gadget.c
drivers/usb/musb/tusb6010.c
that had been seen in linux-next.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
If xfernotready is received and there is no request in request_list then
REQUEST_PENDING flag must be set, so that next request in ep queue is executed.
In case of isoc transfer, if xfernotready is already elapsed and even first
request has not been queued to request_list, then issue END TRANSFER, so that
you can receive xfernotready again and can have notion of current microframe.
Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
In case of ep0 out, if length is not aligned to maxpacket size then we use
dwc->ep_bounce_addr for dma transfer and not request->dma. Since, we have
alreday done memcpy from dwc->ep0_bounce to request->buf, so we do not need to
issue cache sync function. In fact, cache sync function will bring wrong data
in request->buf from request->dma in this scenario.
So, cache sync function must not be executed in case of ep0 bounced.
Cc: <stable@vger.kernel.org> # v3.4 v3.5
Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
When connection is established non-ss mode, endpoint.maxburst is correctly set
to 0, this means that current code will set maxburst bitfield on DEPCFG's
parameter 0 to the highest possible value (0x0f) which is wrong.
Even though this hasn't caused any issues so far (HW seems to ignore that when
not running in SS mode) we want to make sure maxburst bitfield is only set to
anything other than zero if we're running on SuperSpeed mode. In order to
achieve that, let's check for gadget's operating speed before setting maxburst
bitfield when issuing DEPCFG command.
[ balbi@ti.com : improved commit log a bit in order to clarify the situation ]
Signed-off-by: Chanho Park <chanho61.park@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
In case some gadget driver tries to enable an endpoint
which is already enabled, we print a nice WARN so we
can track broken gadget drivers. The only problem is that
we're printing the WARN when we already changed endpoint's
name, which would result in endpoints named as:
ep1in-bulk-bulk-bulk-bulk-bulk-bulk-bulk
To prevent that, we will continue to print the WARN,
but do so before changing endpoint's name and return
early.
Signed-off-by: Felipe Balbi <balbi@ti.com>
dwc3_stop_active_transfer has been called from two places. After each
calling of this function , we should allow 100 us delay to synchronize
with interconnect.
It would be better if we put this delay in that function only, rather
than into calling routine of this function.
Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Reported-by: Michel Sanches <michel.sanches@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
When MISSED_ISOC is set, BUSY is also set. Since, we are handling
MISSED_ISOC as a separate case in third scenario, therefore handle only
BUSY but not MISSED_ISOC in second scenario.
Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This patch fixes the following sparse warnings:
drivers/usb/dwc3/gadget.c:1096:7: warning: symbol 'ret' shadows an earlier one
drivers/usb/dwc3/gadget.c:1058:8: originally declared here
drivers/usb/dwc3/gadget.c:1100:16: warning: symbol 'dwc' shadows an earlier one
drivers/usb/dwc3/gadget.c:1057:15: originally declared here
drivers/usb/dwc3/gadget.c:1118:16: warning: symbol 'dwc' shadows an earlier one
drivers/usb/dwc3/gadget.c:1057:15: originally declared here
drivers/usb/dwc3/gadget.c:1800:19: warning: symbol 'dep' shadows an earlier one
drivers/usb/dwc3/gadget.c:1778:18: originally declared here
Also, fix the potential checkpatch errors around the if() loops that
this fix patch can create.
Signed-off-by: Moiz Sonasath <m-sonasath@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
lots of changes for the dwc3 driver which will make
the driver a lot more stable and some changes which
are just cosmetic.
The bulk of changes is related to mis-defined macros
which were never used before, some fixes to error path
which e.g. prevent the driver from initiating two
transfer on ep0out in case of stall, some fixes to
request dequeueing and the End Transfer Command.
We have some changes to U1/U2 handling where we were
enabling those transtions at the wrong spot (though
we haven't seen a problem from that as of today).
A few patches will make it easier to add support for
newer releases of the core by adding definitions for
new registers and changing the code to act accordingly
when certain revisions are detected.
There's also the usual comestic changes to make the
driver easier to maintain and make it easier for new-
comers to understand the driver. Also one patch fixing
a double inclusion of a header.
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Merge tag 'dwc3-for-v3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next
usb: dwc3: patches for v3.6 merge window
lots of changes for the dwc3 driver which will make
the driver a lot more stable and some changes which
are just cosmetic.
The bulk of changes is related to mis-defined macros
which were never used before, some fixes to error path
which e.g. prevent the driver from initiating two
transfer on ep0out in case of stall, some fixes to
request dequeueing and the End Transfer Command.
We have some changes to U1/U2 handling where we were
enabling those transtions at the wrong spot (though
we haven't seen a problem from that as of today).
A few patches will make it easier to add support for
newer releases of the core by adding definitions for
new registers and changing the code to act accordingly
when certain revisions are detected.
There's also the usual comestic changes to make the
driver easier to maintain and make it easier for new-
comers to understand the driver. Also one patch fixing
a double inclusion of a header.
This is quite a big pull request and contains patches
all over the place.
omap_udc is now a bit cleaner after removing omap2 support,
fixing some checkpatch.pl warnings and errors, switching over
to generic map/unmap routines and preventing a NULL pointer
de-reference.
s3c-hsotg has been switched over to devm_* API, got some
locking fixes and improvements and it also got an implementation
for the pullup() method.
the mass storage gadgets changed default value of the removable
parameter, dropped some unused options and made "file" and "ro"
module_parameters read-only in some cases.
ffs function got support for HID descriptor.
Some UDCs have been converted to clk_prepare_enable() and
clk_disable_unprepare().
Marvell now got support for its USB3 controller in mainline
after introducing its mv_u3d_core.c driver.
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Merge tag 'gadget-for-v3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next
usb: gadget: patches for v3.6 merge window
This is quite a big pull request and contains patches
all over the place.
omap_udc is now a bit cleaner after removing omap2 support,
fixing some checkpatch.pl warnings and errors, switching over
to generic map/unmap routines and preventing a NULL pointer
de-reference.
s3c-hsotg has been switched over to devm_* API, got some
locking fixes and improvements and it also got an implementation
for the pullup() method.
the mass storage gadgets changed default value of the removable
parameter, dropped some unused options and made "file" and "ro"
module_parameters read-only in some cases.
ffs function got support for HID descriptor.
Some UDCs have been converted to clk_prepare_enable() and
clk_disable_unprepare().
Marvell now got support for its USB3 controller in mainline
after introducing its mv_u3d_core.c driver.
Although timeout has never been experienced, still to make it
meaningful, its better to return error if it ever occurs.
Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
As per databook, ACCEPT{U1,U2}ENA bits should be set after receiving
SetConfiguration Command.
Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
as per databook, these bits are cleared by hardware on each USB reset,
so no need to clear it explicitly by software in reset ISR.
Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
as per data book any HIRD threshold value greater than 4b1100 is
invalid. So set the maximum valid value as default values.
Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
set_halt for ep0 is called to stall a deferred control responses by the
gadget. We already have a function to stall default control endpoint.
This patch points set_halt for ep0 to the already available function.
Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Michel Sanches <michel.sanches@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
whenever we want to stall ep0, we always call
dwc3_ep0_stall_and_restart() which makes sure
to send ep0state properly rendering the code
in __dwc3_gadget_ep_set_halt() duplicated.
Reported-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
It makes it easier to read and also avoids
setting DWC3_EP_PENDING_REQUEST just so the
next branch evaluates true.
No functional changes otherwise.
Cc: Pratyush Anand <pratyush.anand@st.com>
Cc: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Now we are sure that, if res_trans_idx is zero, then endpoint has been
stopped. So it's safe to just return if endpoint is already stopped. No
need to generate warning anymore.
While doing so, it's better to return when res_trans_idx is zero and
decrease one level of indentation.
Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
[ balbi@ti.com: slightly changed commit log ]
Signed-off-by: Felipe Balbi <balbi@ti.com>
In case of ep_disable and reset interrupt is received and, still there
was at least one request queued for dma transfer, then endpoint is
stopped first. Once endpoint is stopped, callback for all queued
request must be called.
Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
In case of ep_dequeue , if dequeued request was submitted for dma
transfer, then endpoint is stopped. Once endpoint is stooped, callback
for the dequeued request must be called.
Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
bMaxBurst field on endpoint companion descriptor
is supposed to contain the number of burst minus
1. When passing that to controller drivers, we
should be passing the real number instead (by
incrementing 1).
While doing that, also fix the assumption on
dwc3 that value comes decremented by one.
Signed-off-by: Felipe Balbi <balbi@ti.com>
By the time we're disabling the endpoint, HW
could already have posted more events to our
event buffer. In that case, we will receive
endpoint events for a disabled endpoint.
In order to protect ourselves from that situation,
we simply ignore endpoint interrupts whenever
the endpoint is disabled.
Tested-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
In case we get disconnected, we will call gadget
driver's disconnect method, which should make
sure to disable all endpoints. At that point
we will call stop_active_transfers() to make
sure we didn't leave any pending request on the
controller.
Tested-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
That IRQ is causing way too much trouble. We have
a different handling which was agreed with IP
provider and has been tested with FPGA and OMAP5.
Tested-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
We never set CMDIOC bit for Start Transfer
command, so that code will never be used.
Tested-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
If event status says that its last completed TRB but TRB is still owned
by HW then break from the loop, because we are not going to get correct
TRB status from trb control/size register.
Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
If an IN transfer is missed on isoc endpoint, then driver must insure
that next ep_queue is properly handled.
This patch fixes this issue by starting a new transfer for next queued
request.
Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Currently in case of isoc, interrupt is programmed after each
TRB_NUM/4 ie 8th TRB. A TRB is programmed against each submitted
request from gadget. If we do not want to limit the minimum number of
necessary request to be submitted from gadget then we must receive
interrupt on each TRB submission. There can be such situation with a
gadget working with ping-pong buffer.
If a gadget does not want to receive interrupt after each request
completion then it may set no_interrupt flag.
Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
According to the databook, the DWC3 Core will
reset those bits to 0 on USB Bus Reset. This
means we must re-enable those bits on every
reset interrupt.
Because we will always get a Reset interrupt
after loading a gadget driver, we can, instead
of re-enabling something that was just lost,
move the handling of those bits to the Reset
Interrupt.
This patch fixes USB30CV U1/U2 Test.
Signed-off-by: Gerard CAUVY <g-cauvy1@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
If we don't read out the contents of the register
(in order to reinitialize 'reg' variable) we will
be writing unknown contents to the DCTL register
whenever we try to use dwc3_gadget_wakeup() function.
Signed-off-by: Felipe Balbi <balbi@ti.com>
Recent cores (>= 1.94a) have a set of new features,
commands and a slightly different programming model.
This patch aims to support those changes.
Signed-off-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
those two functions don't power PHYs, they simply
put them in suspend state. Rename to reflect better
what functions actually do.
Signed-off-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This pull request contains one workaround for a Silicon
Issue found on all RTL releases prior to 2.20a, which
would cause a metastability state on Run/Stop bit.
We also have some patches implementing a few extra Standard
requests introduced by USB3 spec (Set SEL and Set Isoch Delay),
as well as one patch, which has been pending for a long time,
implementing LPM support.
Last, but not least, we are splitting the host address space
out of the dwc3 core driver otherwise xHCI won't be able to
request_mem_region() its own address space. This patch is
only needed because we are (as we should) re-using the xHCI
driver, which is a completely separate module.
Together with these three big changes, come a few extra preparatory
patches which most move code around, define macros and so on, as
well as a fix for Isochronous transfers which hasn't been triggered
before.
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Merge tag 'dwc3-for-v3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next
usb: dwc3: patches for v3.5 merge window
This pull request contains one workaround for a Silicon
Issue found on all RTL releases prior to 2.20a, which
would cause a metastability state on Run/Stop bit.
We also have some patches implementing a few extra Standard
requests introduced by USB3 spec (Set SEL and Set Isoch Delay),
as well as one patch, which has been pending for a long time,
implementing LPM support.
Last, but not least, we are splitting the host address space
out of the dwc3 core driver otherwise xHCI won't be able to
request_mem_region() its own address space. This patch is
only needed because we are (as we should) re-using the xHCI
driver, which is a completely separate module.
Together with these three big changes, come a few extra preparatory
patches which most move code around, define macros and so on, as
well as a fix for Isochronous transfers which hasn't been triggered
before.
[ resolved conflicts and build error in drivers/usb/dwc3/gadget.c - gregkh]
to avoid sprinkling magic constants on the driver
we define a constant to be used when allocating
setup_buffer and ep0_bounce buffer.
Signed-off-by: Felipe Balbi <balbi@ti.com>
Issue an Update Transfer command after queuing a request to an isoc
EP with an active transfer. This is required according to the dwc3
databook. Pratyush Anand reports that this fixes a problem he was
having with Isoc IN transfers.
Tested-by: Pratyush Anand<pratyush.anand@st.com>
Signed-off-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
We want to re-use that buffer for other USB
requests, so let's increase it to biggest
wMaxPacketSize for ep0 so it works for everything
we have in mind.
Signed-off-by: Felipe Balbi <balbi@ti.com>
On device loading the driver enables LPM and the acceptance of U1 and U2
states. The [Set|Clear]Feature requests for "U1/U2" are forwarded
directly to the hardware and allow / forbid the initiation of the low
power links.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
All revisions prior to 2.20a have a known issue which
causes metastability state on Run/Stop bit if we
configure the core to work on any of the USB2-only
speeds.
The suggested workaround is just to never configure the
core to anything other than SuperSpeed.
Signed-off-by: Felipe Balbi <balbi@ti.com>
Here are the changes for v3.4 merge window.
It includes a new glue layer for Samsung's Exynos platform, a simplification of
memory management on DWC3 driver by using dev_xxx functions, a few
optimizations to IRQ handling by dropping memcpy() and using bitshifts, a fix
for TI's OMAP5430 TX Fifo Allocation, two fixes on USB2 test mode
implementation (one on debugfs and one on ep0), and several minor changes such
as whitespace cleanups, simplification of a few parts of the code, decreasing a
long delay to something a bit saner, dropping a header which was included twice
and so on.
The highlight on this merge is the support for Samsung's Exynos platform,
increasing the number of different users for this driver to three.
Note that Samsung Exynos glue layer will only compile on platforms which
provide implementation for the clk API for now. Once Samsung supports
pm_runtime, that limitation can be dropped from the Makefile.
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Merge tag 'dwc3-for-v3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next
usb: dwc3: changes for v3.4 merge window
Here are the changes for v3.4 merge window.
It includes a new glue layer for Samsung's Exynos platform, a simplification of
memory management on DWC3 driver by using dev_xxx functions, a few
optimizations to IRQ handling by dropping memcpy() and using bitshifts, a fix
for TI's OMAP5430 TX Fifo Allocation, two fixes on USB2 test mode
implementation (one on debugfs and one on ep0), and several minor changes such
as whitespace cleanups, simplification of a few parts of the code, decreasing a
long delay to something a bit saner, dropping a header which was included twice
and so on.
The highlight on this merge is the support for Samsung's Exynos platform,
increasing the number of different users for this driver to three.
Note that Samsung Exynos glue layer will only compile on platforms which
provide implementation for the clk API for now. Once Samsung supports
pm_runtime, that limitation can be dropped from the Makefile.
Conflicts:
drivers/usb/dwc3/gadget.c
Transfer resource index is cleared in hardware when XFERCOMPLETE
event is generated, so clear the driver's res_trans_idx variable
immediately after that event is received. The upcoming hibernation
patches depend on this change.
Signed-off-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Kishon Vijay Abraham I