From: Sergei Shtylyov <sshtylyov@ru.mvista.com>
To: Michael <michaelzwrk@gmail.com>
Cc: linuxppc-embedded@ozlabs.org, linux-ide@vger.kernel.org
Subject: Re: IDE driver in polling mode
Date: Tue, 10 Apr 2007 18:19:48 +0400 [thread overview]
Message-ID: <461B9D04.2000109@ru.mvista.com> (raw)
In-Reply-To: <1ea6be8e0704100635ydbf1538i782e796c99891e5d@mail.gmail.com>
Hello.
Michael wrote:
> I'd like to know whether it is possible to use IDE driver (ide-disk)
> in polling mode, instead of using IRQ.
I generally wouldn't recommend using this mode since the ATA polling
protocol had been racy for years, WRT to the interrupt pending condition.
> In case you wonder - the reason why I need this weired thing is that I
> have a compact flash connected directly to the host local bus using
> memory mode. It is more-or-less IDE-compatible, except that it doesn't
> issue interrupts.
Ah, no interrupts at all...
The old IDE core in drivers/ide/ certainly doesn't support polling mode
and IRQ-less devices. AFAICS, libata also doesn't support the latter...
MBR, Sergei
WARNING: multiple messages have this Message-ID (diff)
From: Sergei Shtylyov <sshtylyov@ru.mvista.com>
To: Michael <michaelzwrk@gmail.com>
Cc: linux-ide@vger.kernel.org, linuxppc-embedded@ozlabs.org
Subject: Re: IDE driver in polling mode
Date: Tue, 10 Apr 2007 18:19:48 +0400 [thread overview]
Message-ID: <461B9D04.2000109@ru.mvista.com> (raw)
In-Reply-To: <1ea6be8e0704100635ydbf1538i782e796c99891e5d@mail.gmail.com>
Hello.
Michael wrote:
> I'd like to know whether it is possible to use IDE driver (ide-disk)
> in polling mode, instead of using IRQ.
I generally wouldn't recommend using this mode since the ATA polling
protocol had been racy for years, WRT to the interrupt pending condition.
> In case you wonder - the reason why I need this weired thing is that I
> have a compact flash connected directly to the host local bus using
> memory mode. It is more-or-less IDE-compatible, except that it doesn't
> issue interrupts.
Ah, no interrupts at all...
The old IDE core in drivers/ide/ certainly doesn't support polling mode
and IRQ-less devices. AFAICS, libata also doesn't support the latter...
MBR, Sergei
next prev parent reply other threads:[~2007-04-10 14:18 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-10 13:35 IDE driver in polling mode Michael
2007-04-10 14:19 ` Sergei Shtylyov [this message]
2007-04-10 14:19 ` Sergei Shtylyov
2007-04-10 14:44 ` Mark Lord
2007-04-10 15:31 ` Michael
2007-04-10 16:11 ` Alan Cox
2007-04-10 16:18 ` Jeff Garzik
2007-04-10 16:18 ` Jeff Garzik
2007-04-10 16:29 ` Alan Cox
2007-04-11 8:39 ` Michael
2007-04-11 8:39 ` Michael
2007-04-11 8:47 ` Alan Cox
2007-04-11 15:10 ` Michael
2007-04-11 15:10 ` Michael
2007-04-11 15:23 ` Alan Cox
2007-04-11 15:23 ` Alan Cox
2007-04-12 13:39 ` Mark Lord
2007-04-12 13:39 ` Mark Lord
2007-04-12 13:40 ` Mark Lord
2007-04-12 13:40 ` Mark Lord
2007-04-12 13:43 ` Mark Lord
2007-04-12 13:43 ` Mark Lord
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