[U-Boot] Fwd: [PATCH] MPC5200 FEC MII speed register

[John Rigby]

Jon Smirl wrote:
> John, could you please apply this.
>
> Without this the MII commands don't work on any of the mpc5200
> platforms. mpc5xxx_fec_halt() sets the mii speed register to zero it
> needs to left at a non-zero speed for the commands to function.
>
> ---------- Forwarded message ----------
> From: Jon <jonsmirl at gmail.com>
> Date: Wed, Mar 11, 2009 at 3:08 PM
> Subject: [PATCH] MPC5200 FEC MII speed register
> To: u-boot at lists.denx.de
>
>
> From: Jon Smirl <jonsmirl at gmail.com>
>
> Set a non-zero speed in the MII register so that MII commands will work.
>
> Signed-off-by: Jon Smirl <jonsmirl at gmail.com>
> ---
>  drivers/net/mpc5xxx_fec.c |   23 ++++++++++++++++-------
>  1 files changed, 16 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/net/mpc5xxx_fec.c b/drivers/net/mpc5xxx_fec.c
> index 89e91c3..1876b76 100644
> --- a/drivers/net/mpc5xxx_fec.c
> +++ b/drivers/net/mpc5xxx_fec.c
> @@ -285,13 +285,6 @@ static int mpc5xxx_fec_init(struct eth_device
> *dev, bd_t * bis)
>        }
>
>        fec->eth->x_cntrl = 0x00000000; /* half-duplex, heartbeat disabled */
> -       if (fec->xcv_type != SEVENWIRE) {
> -               /*
> -                * Set MII_SPEED = (1/(mii_speed * 2)) * System Clock
> -                * and do not drop the Preamble.
> -                */
> -               fec->eth->mii_speed = (((gd->ipb_clk >> 20) / 5) <<
> 1); /* No MII for 7-wire mode */
> -       }
>
>        /*
>         * Set Opcode/Pause Duration Register
> @@ -649,6 +642,15 @@ static void mpc5xxx_fec_halt(struct eth_device *dev)
>         */
>        udelay(10);
>
> +       /* don't leave the MII speed set to zero */
> +       if (fec->xcv_type != SEVENWIRE) {
> +               /*
> +                * Set MII_SPEED = (1/(mii_speed * 2)) * System Clock
> +                * and do not drop the Preamble.
> +                */
> +               fec->eth->mii_speed = (((gd->ipb_clk >> 20) / 5) <<
> 1); /* No MII for 7-wire mode */
> +       }
> +
>  #if (DEBUG & 0x3)
>        printf("Ethernet task stopped\n");
>  #endif
> @@ -906,6 +908,13 @@ int mpc5xxx_fec_initialize(bd_t * bis)
>  #else
>  #error fec->xcv_type not initialized.
>  #endif
> +       if (fec->xcv_type != SEVENWIRE) {
> +               /*
> +                * Set MII_SPEED = (1/(mii_speed * 2)) * System Clock
> +                * and do not drop the Preamble.
> +                */
> +               fec->eth->mii_speed = (((gd->ipb_clk >> 20) / 5) <<
> 1); /* No MII for 7-wire mode */
> +       }
>
>        dev->priv = (void *)fec;
>        dev->iobase = MPC5XXX_FEC;
>
>
>
>
>   
done