[PATCHv3,03/15] net: tsec: convert to use DM_MDIO when DM_ETH enabled

From: Hou Zhiqiang <Zhiqiang.Hou at nxp.com>

For the platforms on which the eTSEC driver uses DM_ETH, convert its
MDIO controller code to also use DM_MDIO.

Note that for handling the TBI PHY (the MAC PCS for SGMII), we still
don't register a udevice for it, since we can drive it locally and there
is no point in doing otherwise.

Signed-off-by: Vladimir Oltean <vladimir.oltean at nxp.com>
Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou at nxp.com>
---
V3:
 - Draw from the tsec.c part of the Vladimir's patch below and do some
   slightly tweaking: 
   https://patchwork.ozlabs.org/project/uboot/patch/20200503185227.28731-4-olteanv at gmail.com/

 drivers/net/tsec.c | 46 +++++++++++++---------------------------------
 1 file changed, 13 insertions(+), 33 deletions(-)

On Fri, 12 Jun 2020 at 18:23, Zhiqiang Hou <Zhiqiang.Hou at nxp.com> wrote:
>
> From: Hou Zhiqiang <Zhiqiang.Hou at nxp.com>
>
> For the platforms on which the eTSEC driver uses DM_ETH, convert its
> MDIO controller code to also use DM_MDIO.
>
> Note that for handling the TBI PHY (the MAC PCS for SGMII), we still
> don't register a udevice for it, since we can drive it locally and there
> is no point in doing otherwise.
>
> Signed-off-by: Vladimir Oltean <vladimir.oltean at nxp.com>
> Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou at nxp.com>
> ---
> V3:
>  - Draw from the tsec.c part of the Vladimir's patch below and do some
>    slightly tweaking:
>    https://patchwork.ozlabs.org/project/uboot/patch/20200503185227.28731-4-olteanv at gmail.com/
>
>  drivers/net/tsec.c | 46 +++++++++++++---------------------------------
>  1 file changed, 13 insertions(+), 33 deletions(-)
>
> diff --git a/drivers/net/tsec.c b/drivers/net/tsec.c
> index 3d75acb6b4..cb3e56d439 100644
> --- a/drivers/net/tsec.c
> +++ b/drivers/net/tsec.c
> @@ -18,6 +18,7 @@
>  #include <linux/bitops.h>
>  #include <linux/delay.h>
>  #include <linux/errno.h>
> +#include <miiphy.h>
>  #include <asm/processor.h>
>  #include <asm/io.h>
>
> @@ -681,8 +682,15 @@ static int init_phy(struct tsec_private *priv)
>         if (priv->interface == PHY_INTERFACE_MODE_SGMII)
>                 tsec_configure_serdes(priv);
>
> +#ifdef CONFIG_DM_ETH
> +       if (ofnode_valid(ofnode_find_subnode(priv->dev->node, "fixed-link")))
> +               phydev = phy_connect(NULL, 0, priv->dev, priv->interface);
> +       else
> +               phydev = dm_eth_phy_connect(priv->dev);
> +#else

You said it's better to split the fixed-link functionality into a
separate patch, but then you didn't :)

>         phydev = phy_connect(priv->bus, priv->phyaddr, priv->dev,
>                              priv->interface);
> +#endif
>         if (!phydev)
>                 return 0;
>
> @@ -787,14 +795,17 @@ int tsec_standard_init(bd_t *bis)
>         return tsec_eth_init(bis, tsec_info, ARRAY_SIZE(tsec_info));
>  }
>  #else /* CONFIG_DM_ETH */
> +
> +#ifndef CONFIG_DM_MDIO
> +#error "TSEC with DM_ETH also requires DM_MDIO"
> +#endif
> +
>  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;
>         const char *phy_mode;
>         fdt_addr_t reg;
>         ofnode parent;
> @@ -803,31 +814,6 @@ int tsec_probe(struct udevice *dev)
>         pdata->iobase = (phys_addr_t)dev_read_addr(dev);
>         priv->regs = dev_remap_addr(dev);
>
> -       if (dev_read_phandle_with_args(dev, "phy-handle", NULL, 0, 0,
> -                                      &phandle_args)) {
> -               printf("phy-handle does not exist under tsec %s\n", dev->name);
> -               return -ENOENT;
> -       } else {
> -               int reg = ofnode_read_u32_default(phandle_args.node, "reg", 0);
> -
> -               priv->phyaddr = reg;
> -       }
> -
> -       parent = ofnode_get_parent(phandle_args.node);
> -       if (!ofnode_valid(parent)) {
> -               printf("No parent node for PHY?\n");
> -               return -ENOENT;
> -       }
> -
> -       reg = ofnode_get_addr_index(parent, 0);
> -       if (reg == FDT_ADDR_T_NONE) {
> -               printf("No 'reg' property of MII for external PHY\n");
> -               return -ENOENT;
> -       }
> -
> -       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);
>         if (ret == 0) {
> @@ -865,12 +851,6 @@ int tsec_probe(struct udevice *dev)
>         if (priv->interface == PHY_INTERFACE_MODE_SGMII)
>                 priv->flags |= TSEC_SGMII;
>
> -       mdio_info.regs = ext_phyregs_mii;
> -       mdio_info.name = (char *)dev->name;
> -       ret = fsl_pq_mdio_init(NULL, &mdio_info);
> -       if (ret)
> -               return ret;
> -
>         /* Reset the MAC */
>         setbits_be32(&priv->regs->maccfg1, MACCFG1_SOFT_RESET);
>         udelay(2);  /* Soft Reset must be asserted for 3 TX clocks */
> --
> 2.25.1
>

Hi Vladimir,

Thanks a lot for your comments!

> -----Original Message-----
> From: Vladimir Oltean [mailto:olteanv at gmail.com]
> Sent: 2020?6?13? 4:31
> To: Z.q. Hou <zhiqiang.hou at nxp.com>
> Cc: u-boot <u-boot at lists.denx.de>; Priyanka Jain <priyanka.jain at nxp.com>;
> Bin Meng <bmeng.cn at gmail.com>; Vladimir Oltean
> <vladimir.oltean at nxp.com>
> Subject: Re: [PATCHv3 03/15] net: tsec: convert to use DM_MDIO when
> DM_ETH enabled
> 
> On Fri, 12 Jun 2020 at 18:23, Zhiqiang Hou <Zhiqiang.Hou at nxp.com> wrote:
> >
> > From: Hou Zhiqiang <Zhiqiang.Hou at nxp.com>
> >
> > For the platforms on which the eTSEC driver uses DM_ETH, convert its
> > MDIO controller code to also use DM_MDIO.
> >
> > Note that for handling the TBI PHY (the MAC PCS for SGMII), we still
> > don't register a udevice for it, since we can drive it locally and
> > there is no point in doing otherwise.
> >
> > Signed-off-by: Vladimir Oltean <vladimir.oltean at nxp.com>
> > Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou at nxp.com>
> > ---
> > V3:
> >  - Draw from the tsec.c part of the Vladimir's patch below and do some
> >    slightly tweaking:
> >
> > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fpatc
> >
> hwork.ozlabs.org%2Fproject%2Fuboot%2Fpatch%2F20200503185227.28731-
> 4-ol
> >
> teanv%40gmail.com%2F&amp;data=02%7C01%7CZhiqiang.Hou%40nxp.com
> %7Ce4ec9
> >
> e0d5ef84ddf730408d80f0f9963%7C686ea1d3bc2b4c6fa92cd99c5c301635%7
> C0%7C0
> > %7C637275906955031325&amp;sdata=muGA37v8K5glLrZJD2u63%2FFSmJ
> eNeRVCX8u%
> > 2F400xgQA%3D&amp;reserved=0
> >
> >  drivers/net/tsec.c | 46
> > +++++++++++++---------------------------------
> >  1 file changed, 13 insertions(+), 33 deletions(-)
> >
> > diff --git a/drivers/net/tsec.c b/drivers/net/tsec.c index
> > 3d75acb6b4..cb3e56d439 100644
> > --- a/drivers/net/tsec.c
> > +++ b/drivers/net/tsec.c
> > @@ -18,6 +18,7 @@
> >  #include <linux/bitops.h>
> >  #include <linux/delay.h>
> >  #include <linux/errno.h>
> > +#include <miiphy.h>
> >  #include <asm/processor.h>
> >  #include <asm/io.h>
> >
> > @@ -681,8 +682,15 @@ static int init_phy(struct tsec_private *priv)
> >         if (priv->interface == PHY_INTERFACE_MODE_SGMII)
> >                 tsec_configure_serdes(priv);
> >
> > +#ifdef CONFIG_DM_ETH
> > +       if (ofnode_valid(ofnode_find_subnode(priv->dev->node,
> "fixed-link")))
> > +               phydev = phy_connect(NULL, 0, priv->dev,
> priv->interface);
> > +       else
> > +               phydev = dm_eth_phy_connect(priv->dev); #else
> 
> You said it's better to split the fixed-link functionality into a separate patch,
> but then you didn't :)

Oops, I had amnesia?
It will be split in next version.

Thanks,
Zhiqiang

> 
> >         phydev = phy_connect(priv->bus, priv->phyaddr, priv->dev,
> >                              priv->interface);
> > +#endif
> >         if (!phydev)
> >                 return 0;
> >
> > @@ -787,14 +795,17 @@ int tsec_standard_init(bd_t *bis)
> >         return tsec_eth_init(bis, tsec_info, ARRAY_SIZE(tsec_info));
> > }  #else /* CONFIG_DM_ETH */
> > +
> > +#ifndef CONFIG_DM_MDIO
> > +#error "TSEC with DM_ETH also requires DM_MDIO"
> > +#endif
> > +
> >  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;
> >         const char *phy_mode;
> >         fdt_addr_t reg;
> >         ofnode parent;
> > @@ -803,31 +814,6 @@ int tsec_probe(struct udevice *dev)
> >         pdata->iobase = (phys_addr_t)dev_read_addr(dev);
> >         priv->regs = dev_remap_addr(dev);
> >
> > -       if (dev_read_phandle_with_args(dev, "phy-handle", NULL, 0, 0,
> > -                                      &phandle_args)) {
> > -               printf("phy-handle does not exist under tsec %s\n",
> dev->name);
> > -               return -ENOENT;
> > -       } else {
> > -               int reg = ofnode_read_u32_default(phandle_args.node,
> "reg", 0);
> > -
> > -               priv->phyaddr = reg;
> > -       }
> > -
> > -       parent = ofnode_get_parent(phandle_args.node);
> > -       if (!ofnode_valid(parent)) {
> > -               printf("No parent node for PHY?\n");
> > -               return -ENOENT;
> > -       }
> > -
> > -       reg = ofnode_get_addr_index(parent, 0);
> > -       if (reg == FDT_ADDR_T_NONE) {
> > -               printf("No 'reg' property of MII for external PHY\n");
> > -               return -ENOENT;
> > -       }
> > -
> > -       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);
> >         if (ret == 0) {
> > @@ -865,12 +851,6 @@ int tsec_probe(struct udevice *dev)
> >         if (priv->interface == PHY_INTERFACE_MODE_SGMII)
> >                 priv->flags |= TSEC_SGMII;
> >
> > -       mdio_info.regs = ext_phyregs_mii;
> > -       mdio_info.name = (char *)dev->name;
> > -       ret = fsl_pq_mdio_init(NULL, &mdio_info);
> > -       if (ret)
> > -               return ret;
> > -
> >         /* Reset the MAC */
> >         setbits_be32(&priv->regs->maccfg1, MACCFG1_SOFT_RESET);
> >         udelay(2);  /* Soft Reset must be asserted for 3 TX clocks */
> > --
> > 2.25.1
> >