Hello again.
I've just committed the patch:
http://svnweb.freebsd.org/base?view=revision&revision=257170
Thanks and best regards
Zbigniew Bodek
2013/10/26 Zbigniew Bodek :
> Hello Everyone,
>
> I'm attaching the newest version of the ns8250 UART patch.
> After some discussions I decided to go wi
Hello Everyone,
I'm attaching the newest version of the ns8250 UART patch.
After some discussions I decided to go with busy-wait + timeout solution.
The applied delay should handle exotic corner cases (please notice
that we can't use ns8250_delay()
to get the actual single transmission time since
Hello Ganbold.
Thank you for testing the patch and pointing those issue out.
My detection log from Armada XP:
uart0: <16550 or compatible> mem 0xd0012000-0xd001201f irq 41 on simplebus0
uart0: console (115200,n,8,1)
uart1: <16550 or compatible> mem 0xd0012100-0xd001211f irq 42 on simplebus0
uart2
On Tue, Oct 8, 2013 at 9:58 AM, Ganbold Tsagaankhuu wrote:
> Zbigniew,
>
>
> On Tue, Oct 8, 2013 at 3:54 AM, Zbigniew Bodek wrote:
>
>> Hello.
>>
>> I would like to present a patch for ns8250 serial that I would like to
>> commit in the near future (if there are no objections).
>>
>> The patch is
Zbigniew,
On Tue, Oct 8, 2013 at 3:54 AM, Zbigniew Bodek wrote:
> Hello.
>
> I would like to present a patch for ns8250 serial that I would like to
> commit in the near future (if there are no objections).
>
> The patch is fixing newest DesignWare UART with busy detection.
> During frequency di
Hello Ian.
Well you can't really perform wake event basing on busy interrupt because
we are busy waiting/sleeping i.a. to avoid that interrupt to occur. I tried
to use pause() that should switch to another task for the declared amount
of time and I got:
"panic: mi_switch: switch in a critical sect
On Mon, 2013-10-07 at 14:56 -0600, Ian Lepore wrote:
> On Mon, 2013-10-07 at 22:36 +0200, Zbigniew Bodek wrote:
> > Hello Adrian,
> >
> > Thank you for your remarks.
> > Please check my answers in-line.
> >
> > Best regards
> > Zbigniew Bodek
> >
> >
> > 2013/10/7 Adrian Chadd
> >
> > > Hi,
>
On Mon, 2013-10-07 at 22:36 +0200, Zbigniew Bodek wrote:
> Hello Adrian,
>
> Thank you for your remarks.
> Please check my answers in-line.
>
> Best regards
> Zbigniew Bodek
>
>
> 2013/10/7 Adrian Chadd
>
> > Hi,
> >
> > You should add:
> >
> > * a loop counter, to break out after a while;
>
Hello Adrian,
Thank you for your remarks.
Please check my answers in-line.
Best regards
Zbigniew Bodek
2013/10/7 Adrian Chadd
> Hi,
>
> You should add:
>
> * a loop counter, to break out after a while;
>
[ZBB] In general as long as UART is busy we cannot proceed but if the
timeout occurs we c
I'd love to see a linux style way of saying "I'd like to sleep from roughly
this time interval to this time interval; feel free to do what you need."
Then yes, it could be implemented as a sleep wakeup from a timer, or as a
call to a hypervisor to do the same, or .. or...
-adrian
On 7 October
On Mon, 2013-10-07 at 13:15 -0700, Adrian Chadd wrote:
> Hi,
>
> You should add:
>
> *[snip]
> * a DELAY(1) or something.
>
Why? Why oh why do people write
while (!read_some_status_register())
DELAY(n);
when DELAY() is implemented as, roughly:
while (read_some_counter_register() <
Hi,
You should add:
* a loop counter, to break out after a while;
* a DELAY(1) or something.
-adrian
On 7 October 2013 12:54, Zbigniew Bodek wrote:
> Hello.
>
> I would like to present a patch for ns8250 serial that I would like to
> commit in the near future (if there are no objections).
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