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From: Sergei Shtylyov <sshtylyov@ru.mvista.com>
To: Marc St-Jean <Marc_St-Jean@pmc-sierra.com>
Cc: linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-mips@linux-mips.org
Subject: Re: [PATCH] serial driver PMC MSP71xx, kernel linux-mips.git mast er
Date: Mon, 12 Feb 2007 20:56:25 +0300 [thread overview]
Message-ID: <45D0AA49.8060006@ru.mvista.com> (raw)
In-Reply-To: <45D0A7DA.1040305@pmc-sierra.com>
Hello.
Marc St-Jean wrote:
>> >> > Fourth attempt at the serial driver patch for the PMC-Sierra MSP71xx
>> >>device.
>> I think you need to submit your patch to Andrew Morton since it
>>requires a patch from his tree.
> OK, will do.
In fact, since the serial drivers are not maintained anymore, this seems
the only option.
>> >> > + /* The DesignWare APB UART has an Busy Detect
>> >>(0x07)
>> >> > + * interrupt meaning an LCR write attempt
>> >>occured while the
>> >> > + * UART was busy. The interrupt must be cleared
>> >>by reading
>> >> > + * the UART status register (USR) and the LCR
>> >>re-written. */
>> >> > + unsigned int status;
>> >> > + status = *(volatile u32
>>*)up->port.private_data;
>> >> > + serial_out(up, UART_LCR, up->lcr);
>> >> > +
>> >> > + handled = 1;
>> >> > +
>> >> > + end = NULL;
>> >> > } else if (end == NULL)
>> >> > end = l;
>> >> > return 0;
>> >> Still, shouldn't you be doing this in serial8250_timeout()
>> > No, the serial8250_timeout is for issue 1 at the top, this is for
>> > issue 2.
>> It's for lost interrupts, IIUC. They use anothe timeout handler for the
>>workaround...
> This issue (2) is a completely new type of interrupt generated but the
> DesignWare APB uart, it has nothing to do with lost interrupts.
Yeah, I just thought that the lost interrupts might be a "generic" issue.
>> >>also?
>> >>What IRQ numbers this UART is using, BTW?
>> > For the ports on the device they are 27 and 42. Is there any
>>significance
>> > that I'm not aware of?
>> Yeah, IRQ0 is treated as no IRQ by 8250, and in this case it falls
>>back to using serial8250_timeout() to handle "interrupts".
> Good to know. It won't be affecting us then.
This may be overriden anyway...
>> >> Oops, your mailer went and did it again. :-)
>> > I'm completely giving up on Thunderbird,unless someone can point out
>> Ypu should have long ago. :-)
>> > the specific internal configuration items which needs a kick!
>> Only the attachments will work in the Mozilla kind mailer, AFAIK.
>>The last patch looked OK at last. :-)
> The attachemnents appear to be MIME which is a no-no according the
The text/plain type attachments seem to be acceptable for the most
maintainers. This Mozilla can do, at least. :-)
> linux FAQ at kernel.org. I guess I'll stick with /bin/mail.
> Thanks,
> Marc
WBR, Sergei
next prev parent reply other threads:[~2007-02-12 17:56 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-02-12 17:46 Marc St-Jean
2007-02-12 17:56 ` Sergei Shtylyov [this message]
-- strict thread matches above, loose matches on Subject: below --
2007-02-16 17:06 Marc St-Jean
2007-02-16 17:21 ` Sergei Shtylyov
2007-02-16 16:30 Marc St-Jean
2007-02-13 22:11 Marc St-Jean
2007-02-09 19:39 Marc St-Jean
2007-02-10 17:30 ` Sergei Shtylyov
2007-02-07 20:50 Marc St-Jean
2007-02-06 16:52 Marc St-Jean
2007-01-27 0:28 Marc St-Jean
2007-01-25 23:10 Marc St-Jean
2007-01-26 13:58 ` Sergei Shtylyov
2007-01-24 21:10 Marc St-Jean
2007-01-25 14:29 ` Sergei Shtylyov
2007-01-24 16:48 Marc St-Jean
2007-01-24 20:38 ` Sergei Shtylyov
2007-01-24 16:40 Marc St-Jean
2007-01-24 19:40 ` Sergei Shtylyov
2007-01-23 22:37 Marc St-Jean
2007-01-23 23:41 ` Alan
2007-01-24 15:33 ` Sergei Shtylyov
2007-01-22 20:35 Marc St-Jean
2007-01-22 20:34 Marc St-Jean
2007-01-22 19:07 Marc St-Jean
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