In-Circuit Debug Interface is a debugging interface for TI ARM
microcontrollers. It has three USB interfaces and two of them are
presented as standard ACM serial device. The 3rd interface is the
debugging interface and it can be driven as a Linux USB simple
terminal. With it, debugging session and
To start transfer with another stream id, controller needs to free
previously allocated transfer resource. This will be automatically
done by the controller at the time of XferComplete Event. This
patch updates the code to issue XferComplete event once all transfers
are done by setting LST bit in t
According to dwc3 databook when streams are enabled, it may be possible
for the host and gadget to become out of sync, where gadget may wait for
host to issue prime transcation and host may wait for gadget to issue
ERDY. To avoid such potential deadlock conditions, a timer is implemented
in udc/cor
When streaming is enabled on BULK endpoints and LST bit is set
observed MISSED ISOC bit set in event->status for BULK ep. Since
this bit is only valid for isocronous endpoints, changed the code
to check for isocrnous endpoints when MISSED ISOC bit is set.
Signed-off-by: Anurag Kumar Vulisha
Revie
As a part of adding stream timeout timer for stream capable endpoints
stream_capable flag is added into struct usb_ep. Replace the usage of
dep->stream_capable in with usb_ep->stream_capable.
Signed-off-by: Anurag Kumar Vulisha
---
Changes in v6:
1. This patch is newly added in this seri
For stream capable endpoints, uas layer can queue mulpile requests on
single ep with different stream ids. So, there can be multiple pending
requests waiting to be transferred. This patch changes the code to check
for any pending requests waiting to be transferred on ep started_list and
calls __dwc
When bulk streams are enabled for an endpoint, there can
be a condition where the gadget controller waits for the
host to issue prime transaction and the host controller
waits for the gadget to issue ERDY. This condition could
create a deadlock. To avoid such potential deadlocks, a
timer is started
The present code in dwc3_gadget_ep_reclaim_completed_trb() will check
for IOC/LST bit in the event->status and returns if IOC/LST bit is
set. This logic doesn't work if multiple TRBs are queued per
request and the IOC/LST bit is set on the last TRB of that request.
Consider an example where a queue
For stream capable endpoints, stream id related information
needs to be updated into DEPCMD while issuing START TRANSFER.
This patch does the same.
Signed-off-by: Anurag Kumar Vulisha
---
Changes in v6:
1. Used dep->endpoint.stream_capable instead of dep->stream_capable
flag
Availability of TRB's is calculated using dwc3_calc_trbs_left(), which
determines total available TRB's based on the HWO bit set in a TRB.
In the present code, __dwc3_prepare_one_trb() is called with a TRB which
needs to be prepared for transfer. This __dwc3_prepare_one_trb() calls
dwc3_calc_trbs_
Availability of TRB's is calculated using dwc3_calc_trbs_left(), which
determines total available TRB's based on the HWO bit set in a TRB.
In the present code, __dwc3_prepare_one_trb() is called with a TRB which
needs to be prepared for transfer. This __dwc3_prepare_one_trb() calls
dwc3_calc_trbs_
This patch series fixes the broken BULK streaming support in
dwc3 gadget driver and also adds timer into udc/core.c to
avoid deadlock for the endpoints which are bulk stream capable.
Changes in v6:
1. Added timer into udc/core.c for stream capable endpoint
as suggested by "Felip
The stream capable endpoints require stream id to be given
when issuing START TRANSFER. While issuing no-op trb the
stream id is not yet known, so don't issue no-op trb's on
stream capable endpoints.
Signed-off-by: Anurag Kumar Vulisha
---
Chnages in v6:
1. Replaced dep->stream_capable w
Kernel 4.19-rc7, on x86_64:
Load usbip_vudc module, then unload (rmmod) it.
Load it again:
[ 169.042156] calling init+0x0/0x1000 [usbip_vudc] @ 1697
[ 169.042396]
=
[ 169.043678] probe of usbip-vudc.0 returned 1 aft
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