[U-Boot] [RFC PATCH] net: phy: Force master mode for RTL8211C

[Michael Haas <haas@computerlinguist.org>]

On 03/22/2016 08:19 AM, Michael Haas wrote:
> The RTL8211C found on the A20-OlinuXino-Lime2 does not word in slave
> mode. This patch disables master/slave mode autonegotiation and forces
> master mode.
>
> The RTL8211C identifies itself as RTL8211B via its UID. This patch uses
> the revision number taken from the PHYID2 register to distinguish the
> two. The NetBSD driver uses the same approach.
>
> CC: fradav at gmail.com
> CC: merker at debian.org
> CC: hdegoede at redhat.com
> CC: ijc at hellion.org.uk
> CC: joe.hershberger at ni.com
> Signed-off-by: Michael Haas <haas@computerlinguist.org>
> ---
>
>  drivers/net/phy/realtek.c | 16 +++++++++++++++-
>  1 file changed, 15 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/phy/realtek.c b/drivers/net/phy/realtek.c
> index 259a87f..cdb3376 100644
> --- a/drivers/net/phy/realtek.c
> +++ b/drivers/net/phy/realtek.c
> @@ -5,6 +5,7 @@
>   *
>   * Copyright 2010-2011, 2015 Freescale Semiconductor, Inc.
>   * author Andy Fleming
> + * Copyright 2016 Karsten Merker <merker@debian.org>
>   */
>  #include <config.h>
>  #include <common.h>
> @@ -54,6 +55,19 @@ static int rtl8211x_config(struct phy_device *phydev)
>  	phy_write(phydev, MDIO_DEVAD_NONE, MIIM_RTL8211x_PHY_INER,
>  		  MIIM_RTL8211x_PHY_INTR_DIS);
>  
> +	int reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_PHYSID1);
> +	int rev = reg & 0xf;
> +	if (rev == 3 & 6 phydev->phy_id == 0x1cc912) {
> +		/* RTL8211C and RTL8211C are distinguished only by
> +		   their revision number */
> +		reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_CTRL1000);
> +		/* force manual master/slave configuration */
> +		reg |= (1 << 12);
> +		/* force master mode */
> +		reg | = (1 << 11);
> +		phy_write(phydev, MDIO_DEVAD_NONE, MII_CTRL1000, reg);
> +	}
> +
>  	/* read interrupt status just to clear it */
>  	phy_read(phydev, MDIO_DEVAD_NONE, MIIM_RTL8211x_PHY_INER);
>  
> @@ -223,7 +237,7 @@ static int rtl8211f_startup(struct phy_device *phydev)
>  /* Support for RTL8211B PHY */
>  static struct phy_driver RTL8211B_driver = {
>  	.name = "RealTek RTL8211B",
> -	.uid = 0x1cc910,
> +	.uid = 0x1cc912,
>  	.mask = 0xffffff,
>  	.features = PHY_GBIT_FEATURES,
>  	.config = &rtl8211x_config,

I have accidentally included Karsten Merkers '[PATCH] net: phy: Realtek
RTL8211B/C PHY ID fix' due to a botched call to git am earlier. I'll be
re-sending a clean version, but note that Karsten's patch is required.

Michael