From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
To: Arnd Bergmann <arnd@arndb.de>
Cc: Lior Amsalem <alior@marvell.com>, Andrew Lunn <andrew@lunn.ch>,
Russell King <linux@arm.linux.org.uk>,
Jason Cooper <jason@lakedaemon.net>,
Tawfik Bayouk <tawfik@marvell.com>,
Olof Johansson <olof@lixom.net>,
linux-pci@vger.kernel.org, devicetree-discuss@lists.ozlabs.org,
Thierry Reding <thierry.reding@avionic-design.de>,
Grant Likely <grant.likely@secretlab.ca>,
Maen Suleiman <maen@marvell.com>,
Ezequiel Garcia <ezequiel.garcia@free-electrons.com>,
Andrew Murray <andrew.murray@arm.com>,
Bjorn Helgaas <bhelgaas@google.com>,
Gregory Clement <gregory.clement@free-electrons.com>,
Mitch Bradley <wmb@firmworks.com>,
linux-arm-kernel@lists.infradead.org,
Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Subject: Re: [RFC PATCHv1 0/5] Use the mvebu PCIe driver on Kirkwood
Date: Wed, 27 Mar 2013 19:18:50 +0100 [thread overview]
Message-ID: <20130327191850.26ab1623@skate> (raw)
In-Reply-To: <20130327191114.2662b3b8@skate>
Arnd,
On Wed, 27 Mar 2013 19:11:14 +0100, Thomas Petazzoni wrote:
> > I assume it works with PIO, but does the SATA card use the I/O
> > space registers, or just memory space?
>
> Both cards only use memory space. I have a quick and dirty patch for
> the e1000e driver that makes it read/write one particular register from
> the I/O space to test that it works, but I haven't checked this yet on
> Kirkwood. I don't expect much troubles, but who knows.
Just to let you know, I've tested the e1000e with my small changes that
does one I/O access, and it seems to work properly. At least, I read
from the register the value I should be reading (and therefore writing
works, because the I/O space of the e1000e essentially has two
registers: one address register, and one data register, so you must
write one address in the address register before being able to read
something from the data register).
Best regards,
Thomas
--
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
WARNING: multiple messages have this Message-ID (diff)
From: thomas.petazzoni@free-electrons.com (Thomas Petazzoni)
To: linux-arm-kernel@lists.infradead.org
Subject: [RFC PATCHv1 0/5] Use the mvebu PCIe driver on Kirkwood
Date: Wed, 27 Mar 2013 19:18:50 +0100 [thread overview]
Message-ID: <20130327191850.26ab1623@skate> (raw)
In-Reply-To: <20130327191114.2662b3b8@skate>
Arnd,
On Wed, 27 Mar 2013 19:11:14 +0100, Thomas Petazzoni wrote:
> > I assume it works with PIO, but does the SATA card use the I/O
> > space registers, or just memory space?
>
> Both cards only use memory space. I have a quick and dirty patch for
> the e1000e driver that makes it read/write one particular register from
> the I/O space to test that it works, but I haven't checked this yet on
> Kirkwood. I don't expect much troubles, but who knows.
Just to let you know, I've tested the e1000e with my small changes that
does one I/O access, and it seems to work properly. At least, I read
from the register the value I should be reading (and therefore writing
works, because the I/O space of the e1000e essentially has two
registers: one address register, and one data register, so you must
write one address in the address register before being able to read
something from the data register).
Best regards,
Thomas
--
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
next prev parent reply other threads:[~2013-03-27 18:18 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-27 18:04 [RFC PATCHv1 0/5] Use the mvebu PCIe driver on Kirkwood Thomas Petazzoni
2013-03-27 18:04 ` Thomas Petazzoni
2013-03-27 18:05 ` [RFC PATCHv1 1/5] pci: mvebu: enable driver usage " Thomas Petazzoni
2013-03-27 18:05 ` Thomas Petazzoni
2013-03-27 18:05 ` [RFC PATCHv1 2/5] bus: mvebu: fix mistake in PCIe window target attribute for Kirkwood Thomas Petazzoni
2013-03-27 18:05 ` Thomas Petazzoni
2013-04-03 10:52 ` Thomas Petazzoni
2013-04-03 10:52 ` Thomas Petazzoni
2013-04-03 10:57 ` Jason Cooper
2013-04-03 10:57 ` Jason Cooper
2013-04-03 11:05 ` Thomas Petazzoni
2013-04-03 11:05 ` Thomas Petazzoni
2013-03-27 18:05 ` [RFC PATCHv1 3/5] arm: mach-kirkwood: seperate PCIe window init from other windows Thomas Petazzoni
2013-03-27 18:05 ` Thomas Petazzoni
2013-03-27 18:35 ` Jason Gunthorpe
2013-03-27 18:35 ` Jason Gunthorpe
2013-03-27 20:17 ` Thomas Petazzoni
2013-03-27 20:17 ` Thomas Petazzoni
2013-03-27 18:05 ` [RFC PATCHv1 4/5] arm: kirkwood: add SoC-level Device Tree data for PCIe interfaces Thomas Petazzoni
2013-03-27 18:05 ` Thomas Petazzoni
2013-03-27 18:05 ` [RFC PATCHv1 5/5] arm: kirkwood: convert db-88f6281 to the Device Tree Thomas Petazzoni
2013-03-27 18:05 ` Thomas Petazzoni
2013-03-27 18:07 ` [RFC PATCHv1 0/5] Use the mvebu PCIe driver on Kirkwood Arnd Bergmann
2013-03-27 18:07 ` Arnd Bergmann
2013-03-27 18:11 ` Thomas Petazzoni
2013-03-27 18:11 ` Thomas Petazzoni
2013-03-27 18:18 ` Thomas Petazzoni [this message]
2013-03-27 18:18 ` Thomas Petazzoni
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