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

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Message-Id: <201405280839.00973.linux@rainbow-software.org>
Date:	Wed, 28 May 2014 08:39:00 +0200
From:	Ondrej Zary <linux@...nbow-software.org>
To:	Florian Fainelli <f.fainelli@...il.com>
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

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.

> > 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"
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-- 
Ondrej Zary
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