linux-kernel - Re: [PATCH 5/9] tlan: Restart autonegotiation on link loss

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Message-ID: <CAGVrzcY2anVgKaghKYM_A=Qke854byc=uGn2dvbOm-+vQk9bFA@mail.gmail.com>
Date:	Wed, 28 May 2014 10:26:53 -0700
From:	Florian Fainelli <f.fainelli@...il.com>
To:	Ondrej Zary <linux@...nbow-software.org>
Cc:	Samuel Chessman <chessman@....org>,
	netdev <netdev@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 5/9] tlan: Restart autonegotiation on link loss

2014-05-27 23:39 GMT-07:00 Ondrej Zary <linux@...nbow-software.org>:
> On Wednesday 28 May 2014, Florian Fainelli wrote:
>> Hi,
>>
>> 2014-05-27 14:38 GMT-07:00 Ondrej Zary <linux@...nbow-software.org>:
>> > When link is lost on a card which uses internal PHY for 10 Mbit speeds,
>> > restart autonegotiation to allow switching between 10 and 100 Mbps
>> > speeds.
>>
>> I think you should take a look at implementing libphy read/write stubs
>> for this driver, that would allow you not to open-code such things.
>
> Yes, that would be good. However, I don't want to do any major PHY-related
> changes to the driver because it supports cards with various PHY
> configurations and I don't have all the different hardware to test.

That is completely fair, this is a fairly old driver, if it is not
broken, let's keep it as-is.

>
>> > Signed-off-by: Ondrej Zary <linux@...nbow-software.org>
>> > ---
>> >  drivers/net/ethernet/ti/tlan.c |   14 ++++++++++++++
>> >  1 file changed, 14 insertions(+)
>> >
>> > diff --git a/drivers/net/ethernet/ti/tlan.c
>> > b/drivers/net/ethernet/ti/tlan.c index 31d4a96..1047b3f 100644
>> > --- a/drivers/net/ethernet/ti/tlan.c
>> > +++ b/drivers/net/ethernet/ti/tlan.c
>> > @@ -2721,6 +2721,7 @@ static void tlan_phy_finish_auto_neg(struct
>> > net_device *dev) else if (!(mode & 0x0080) && (mode & 0x0040))
>> >                 priv->tlan_full_duplex = true;
>> >
>> > +       /* switch to internal PHY for 10 Mbps */
>> >         if ((!(mode & 0x0180)) &&
>> >             (priv->adapter->flags & TLAN_ADAPTER_USE_INTERN_10) &&
>> >             (priv->phy_num != 0)) {
>> > @@ -2788,6 +2789,19 @@ static void tlan_phy_monitor(unsigned long data)
>> >                                dev->name);
>> >                         tlan_dio_write8(dev->base_addr, TLAN_LED_REG, 0);
>> >                         netif_carrier_off(dev);
>> > +                       if (priv->adapter->flags &
>> > TLAN_ADAPTER_USE_INTERN_10) { +                               /* power
>> > down internal PHY */
>> > +                               u16 data = MII_GC_PDOWN | MII_GC_LOOPBK
>> > +                                       | MII_GC_ISOLATE;
>> > +                               tlan_mii_sync(dev->base_addr);
>> > +                               tlan_mii_write_reg(dev, priv->phy[0],
>> > +                                       MII_GEN_CTL, data);
>> > +                               /* set to external PHY */
>> > +                               priv->phy_num = 1;
>> > +                               /* restart autonegotiation */
>> > +                               tlan_set_timer(dev, (4*HZ/10),
>> > TLAN_TIMER_PHY_PDOWN); +                               return;
>> > +                       }
>> >                 }
>> >         }
>> >
>> > --
>> > Ondrej Zary
>> >
>> > --
>> > To unsubscribe from this list: send the line "unsubscribe linux-kernel"
>> > in the body of a message to majordomo@...r.kernel.org
>> > More majordomo info at  http://vger.kernel.org/majordomo-info.html
>> > Please read the FAQ at  http://www.tux.org/lkml/
>
>
>
> --
> Ondrej Zary



-- 
Florian
--
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