[PATCH 3/3] net: tsec: Access TBI PHY through the corresponding MII

[Z.q. Hou]

Hi Vladimir,

Thanks a lot for your comments!

> -----Original Message-----
> From: Vladimir Oltean <olteanv at gmail.com>
> Sent: 2020年5月3日 22:07
> To: Z.q. Hou <zhiqiang.hou at nxp.com>
> Cc: u-boot <u-boot at lists.denx.de>; Joe Hershberger
> <joe.hershberger at ni.com>; Bin Meng <bmeng.cn at gmail.com>; Priyanka
> Jain <priyanka.jain at nxp.com>
> Subject: Re: [PATCH 3/3] net: tsec: Access TBI PHY through the
> corresponding MII
> 
> Hi Zhiqiang,
> 
> On Sun, 3 May 2020 at 16:49, Z.q. Hou <zhiqiang.hou at nxp.com> wrote:
> >
> > Hi Vladimir,
> >
> > Thanks a lot for your review and test!
> >
> > > -----Original Message-----
> > > From: Vladimir Oltean <olteanv at gmail.com>
> > > Sent: 2020年5月3日 19:35
> > > To: Z.q. Hou <zhiqiang.hou at nxp.com>
> > > Cc: u-boot <u-boot at lists.denx.de>; Joe Hershberger
> > > <joe.hershberger at ni.com>; Bin Meng <bmeng.cn at gmail.com>;
> Priyanka
> > > Jain <priyanka.jain at nxp.com>
> > > Subject: Re: [PATCH 3/3] net: tsec: Access TBI PHY through the
> > > corresponding MII
> > >
> > > On Sun, 3 May 2020 at 09:28, Zhiqiang Hou <Zhiqiang.Hou at nxp.com>
> > > wrote:
> > > >
> > > > From: Hou Zhiqiang <Zhiqiang.Hou at nxp.com>
> > > >
> > > > When an eTSEC is configured to use TBI, configuration of the TBI
> > > > is done through the MIIM registers for that eTSEC.
> > > > For example, if a TBI interface is required on eTSEC2, then the
> > > > MIIM registers starting at offset 0x2_5520 are used to configure it.
> > > >
> > > > Fixes: 9a1d6af55ecd ("net: tsec: Add driver model ethernet
> > > > support")
> > > > Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou at nxp.com>
> > > > ---
> > > >  drivers/net/tsec.c | 17 ++++++++++++++---
> > > >  1 file changed, 14 insertions(+), 3 deletions(-)
> > > >
> > > > diff --git a/drivers/net/tsec.c b/drivers/net/tsec.c index
> > > > ce41aec5cf..31056f3117 100644
> > > > --- a/drivers/net/tsec.c
> > > > +++ b/drivers/net/tsec.c
> > > > @@ -789,6 +789,7 @@ int tsec_probe(struct udevice *dev)  {
> > > >         struct eth_pdata *pdata = dev_get_platdata(dev);
> > > >         struct tsec_private *priv = dev_get_priv(dev);
> > > > +       struct tsec_mii_mng __iomem *ext_phyregs_mii;
> > > >         struct ofnode_phandle_args phandle_args;
> > > >         u32 tbiaddr = CONFIG_SYS_TBIPA_VALUE;
> > > >         struct fsl_pq_mdio_info mdio_info; @@ -820,8 +821,8 @@
> int
> > > > tsec_probe(struct udevice *dev)
> > > >         if (reg == FDT_ADDR_T_NONE)
> > > >                 return -ENOENT;
> > > >
> > > > -       priv->phyregs_sgmii = map_physmem(reg +
> > > TSEC_MDIO_REGS_OFFSET, 0,
> > > > -                                         MAP_NOCACHE);
> > > > +       ext_phyregs_mii = map_physmem(reg +
> > > TSEC_MDIO_REGS_OFFSET, 0,
> > > > +                                     MAP_NOCACHE);
> > > >
> > > >         ret = dev_read_phandle_with_args(dev, "tbi-handle", NULL,
> > > > 0,
> > > 0,
> > > >                                          &phandle_args);
> @@
> > > -830,6
> > > > +831,16 @@ int tsec_probe(struct udevice *dev)
> > > >
> > > >         priv->tbiaddr = tbiaddr;
> > > >
> > > > +       parent = ofnode_get_parent(phandle_args.node);
> > > > +       if (!ofnode_valid(parent)) {
> > > > +               printf("No parent node for TBI PHY?\n");
> > > > +               return -ENOENT;
> > > > +       }
> > > > +
> > > > +       reg = ofnode_get_addr_index(parent, 0);
> > >
> > > Missing a check
> > >
> > >     if (reg == FDT_ADDR_T_NONE)
> > >         return -ENOENT;
> > >
> > > here?
> >
> > Yes, will fix in v2.
> >
> > Thanks,
> > Zhiqiang
> 
> Actually since the TBI PHY is optional (not present on RGMII interfaces and
> such), I don't believe you should return an error, but just skip the
> phyregs_sgmii initialization.

Correct, I just realized it.

Thanks,
Zhiqiang

> 
> >
> > >
> > > > +       priv->phyregs_sgmii = map_physmem(reg +
> > > TSEC_MDIO_REGS_OFFSET, 0,
> > > > +                                         MAP_NOCACHE);
> > > > +
> > > >         phy_mode = dev_read_prop(dev, "phy-connection-type",
> NULL);
> > > >         if (phy_mode)
> > > >                 pdata->phy_interface =
> > > > phy_get_interface_by_name(phy_mode);
> > > > @@ -844,7 +855,7 @@ int tsec_probe(struct udevice *dev)
> > > >         if (priv->interface == PHY_INTERFACE_MODE_SGMII)
> > > >                 priv->flags |= TSEC_SGMII;
> > > >
> > > > -       mdio_info.regs = priv->phyregs_sgmii;
> > > > +       mdio_info.regs = ext_phyregs_mii;
> > > >         mdio_info.name = (char *)dev->name;
> > > >         ret = fsl_pq_mdio_init(NULL, &mdio_info);
> > > >         if (ret)
> > > > --
> > > > 2.17.1
> > > >
> > >
> > > With that:
> > >
> > > Reviewed-by: Vladimir Oltean <vladimir.oltean at nxp.com>
> > > Tested-by: Vladimir Oltean <vladimir.oltean at nxp.com>
> > >
> > > (on LS1021A)
> > >
> > > Thanks!
> > > -Vladimir
> 
> Thanks,
> -Vladimir