netdev - Re: query on dynamic switching between Ethernet ports

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Date:	Fri, 9 Nov 2012 23:32:52 +0530
From:	Rayagond K <rayagond@...avyalabs.com>
To:	Ben Hutchings <bhutchings@...arflare.com>
Cc:	netdev@...r.kernel.org
Subject: Re: query on dynamic switching between Ethernet ports

yes driver issues soft reset to MAC and PHY.

On Fri, Nov 9, 2012 at 9:06 PM, Ben Hutchings <bhutchings@...arflare.com> wrote:
> On Fri, 2012-11-09 at 20:02 +0530, Rayagond K wrote:
>> Hi All,
>>
>> I am implementing handling of dynamic switching between Ethernet ports
>> (1GMbps to 100Mbps mode) using PHY layer, I referred various driver in
>> LXR and doc and I am able to understand the PHY layer and implement in
>> my driver.
>>
>> For now I am able to do following in my driver now,
>>
>> 1. Advertising all the capabilities like FULL duplex, half duplex,
>> pause frames, MII/GMII etc while registering with PHY layer.
>> 2. Able to detect the link up and link down.
>> 3. Able do the auto-negotiation with remote end link partner and
>> program my MAC accordingly.
>> 4. Able to establish the link by connecting and disconnecting the
>> cable many times.
>>
>> But I am facing one problem ie my driver is not able to establish the
>> link when I load the driver first time and connected to 1G port. If I
>> toggle the port connection between MII(10/100Mbps) and GMII(1Gbps) for
>> two/three times and connect it back to GMII ports then driver works
>> fine and it establish the link.
>
> Is the driver resetting everything it needs to when loaded?
>
> Ben.
>
> --
> Ben Hutchings, Staff Engineer, Solarflare
> Not speaking for my employer; that's the marketing department's job.
> They asked us to note that Solarflare product names are trademarked.
>



-- 
wwr
Rayagond
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