[U-Boot-Users] mii_send error or at least strange

[Antonio Di Bacco]

That's a good answer. 

Thank you.

But why do I receive "mii_send STUCK" for example when tftp tries to use FEC2?

Bye.

On Wednesday 15 March 2006 22:38, Ben Warren wrote:
> Antonio,
>
> I'm not sure about the 8xx PowerQUICCs, but other Freescale CPUs with
> multiple ethernet ports support MII data plane on all ports but only
> have one MDIO port (control plane for MII).  Maybe that's why the code
> is this way?
>
> regards,
> Ben
>
> On Wed, 2006-03-15 at 22:31 +0100, Antonio Di Bacco wrote:
> > I had a look to mii_send code in u-boot/cpu/mpc8xx/fec.c . It supports
> > both FEC1 and FEC2 but anyway it seems to write always register mii-data
> > of FEC1, look here:
> >
> > /* send command to phy using mii, wait for result */
> > static uint  mii_send(uint mii_cmd)
> > {
> > uint mii_reply;
> > volatile fec_t *ep;
> > int cnt;
> >
> > ep = &(((immap_t *)CFG_IMMR)->im_cpm.cp_fec);
> >
> > ep->fec_mii_data = mii_cmd; /* command to phy */
> >
> > /* wait for mii complete */
> > cnt = 0;
> > while (!(ep->fec_ievent & FEC_ENET_MII)) {
> > if (++cnt > 1000) {
> > printf("mii_send STUCK!\n");
> > break;
> > }
> > }
> > mii_reply = ep->fec_mii_data; /* result from phy */
> > ep->fec_ievent = FEC_ENET_MII; /* clear MII complete */
> > #if 0
> > printf("%s[%d] %s: sent=0x%8.8x, reply=0x%8.8x\n",
> > __FILE__,__LINE__,__FUNCTION__,mii_cmd,mii_reply);
> > #endif
> > return (mii_reply & 0xffff); /* data read from phy */
> > }
> >
> >
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