Fwd: FEC Not working with imx27 based board

[Kamel BOUHARA <k.bouhara@xxxxxxxxx>]

---------- Forwarded message ----------
From: Kamel BOUHARA <k.bouhara@xxxxxxxxx>
Date: 2011/7/12
Subject: Re: FEC Not working with imx27 based board
To: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>


Yes I've set the correct adress and it's why I don't have fffff like on the phytec.

But in fact I had to change the fec_get_hwadrr() to make it work with my board :

static int fec_get_hwaddr(struct eth_device *dev, unsigned char *mac)

{

int i;

int uninitialized = 0;

for (i=0;i<6;i++) {

mac[6-1-i] = readl(&IIM_BANK_REG(0,(IIM0_MAC+i)));

}

/* uninitialized if all 00 */

if ((mac[0] == 0) && (mac[1] == 0) && (mac[2] == 0) &&

            (mac[3] == 0) && (mac[4] == 0) && (mac[5] == 0))

                uninitialized = 1;

/* uninitialized if all FF (could be safe) */

        if ((mac[0] == 0xff) && (mac[1] == 0xff) && (mac[2] == 0xff) &&

   (mac[3] == 0xff) && (mac[4] == 0xff) && (mac[5] == 0xff))

       uninitialized = 1;

return uninitialized;

}

Before this change it wasn't the case, I had no mac adress in barebox start...

I also added a specific reset :

void fec_reset()

{

        int i=0;

    /*  FEC RESET */

    imx_gpio_mode(CFG_ETHPHY_RST | GPIO_OUT | GPIO_PUEN | GPIO_GPIO);

    printf("Before PHY reset\n");

    GPIO_CLEAR(CFG_ETHPHY_RST);

    udelay(200);

    GPIO_SET(CFG_ETHPHY_RST);

    printf("After PHY reset\n");

    

}

And then I call it in the fec_probe() to ensure the fec is reset properly before settings.

I already tested the fec on u-boot and it works fine, so i tought it can help me with barebox but it seems there are some differences between codes.

For now Im trying to see if it can be a cpu frequence problem because I have an errata on the pll that shifts all my frequencies and so I have to adjust them in the lowlevelinit...

So I would like to know if the clock initialization is taking effect if I boot from RAM ? Do I have t boot from flash ?

Thanks again.

Here is what

2011/7/12 Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>

On Tue, Jul 12, 2011 at 03:54:43PM +0200, Sascha Hauer wrote:
> On Mon, Jul 11, 2011 at 05:14:54PM +0200, Kamel BOUHARA wrote:
> > Hi,
> >
> > Im trying to port barebox to my Armadeus apf27 board (based on the Freescale
> > imx27 with a 512MiB NAND and 1GB of SDRAM).
> > I've first tried the phytec imx27 configuration and I got it worked until
> > the Linux uncompressing task (the machine ID is bad so I didn't expect it
> > will boot fine :)).
> > So I just copied the phycard-imx27 board directory and I followed the
> > boards.dox in order to add support for my board.
> > But when I've tried to boot again it was not working anymore ...
> >
> > There are somethings stranges with the FEC, here is the result of a memory
> > display with both phytec and my own board :
> >
> > > barebox@Phytec phyCard-i.MX27:/ md -s /dev/phy0
> > >
> > > 00000000: ffffffff ffffffff ffffffff ffffffff ................
> > >
> > > 00000010: ffffffff ffffffff ffffffff ffffffff ................
> > >
> > > 00000020: ffffffff ffffffff ffffffff ffffffff ................
> > >
> > > 00000030: ffffffff ffffffff ffffffff ffffffff ................
>
> This means your phy is not configured correctly. Do you usse the correct
> address (can be passed in platform_data).

GPIO pins which hold the phy in reset are another thing which might go
wrong.

Sascha

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__________________________________
Kamel BOUHARA

7 rue Jules César

02100 SAINT-QUENTIN
06.17.83.29.04

-- 
__________________________________
Kamel BOUHARA

7 rue Jules César

02100 SAINT-QUENTIN
06.17.83.29.04

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