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Antonio,<BR>
<BR>
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?<BR>
<BR>
regards,<BR>
Ben<BR>
<BR>
On Wed, 2006-03-15 at 22:31 +0100, Antonio Di Bacco wrote:
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<FONT COLOR="#000000">I had a look to mii_send code in u-boot/cpu/mpc8xx/fec.c . It supports both </FONT>
<FONT COLOR="#000000">FEC1 and FEC2 but anyway it seems to write always register mii-data of FEC1, </FONT>
<FONT COLOR="#000000">look here: </FONT>
<FONT COLOR="#000000"> </FONT>
<FONT COLOR="#000000">/* send command to phy using mii, wait for result */ </FONT>
<FONT COLOR="#000000">static uint mii_send(uint mii_cmd) </FONT>
<FONT COLOR="#000000">{ </FONT>
<FONT COLOR="#000000">uint mii_reply; </FONT>
<FONT COLOR="#000000">volatile fec_t *ep; </FONT>
<FONT COLOR="#000000">int cnt; </FONT>
<FONT COLOR="#000000"> </FONT>
<FONT COLOR="#000000">ep = &(((immap_t *)CFG_IMMR)->im_cpm.cp_fec); </FONT>
<FONT COLOR="#000000"> </FONT>
<FONT COLOR="#000000">ep->fec_mii_data = mii_cmd; /* command to phy */ </FONT>
<FONT COLOR="#000000"> </FONT>
<FONT COLOR="#000000">/* wait for mii complete */ </FONT>
<FONT COLOR="#000000">cnt = 0; </FONT>
<FONT COLOR="#000000">while (!(ep->fec_ievent & FEC_ENET_MII)) { </FONT>
<FONT COLOR="#000000">if (++cnt > 1000) { </FONT>
<FONT COLOR="#000000">printf("mii_send STUCK!\n"); </FONT>
<FONT COLOR="#000000">break; </FONT>
<FONT COLOR="#000000">} </FONT>
<FONT COLOR="#000000">} </FONT>
<FONT COLOR="#000000">mii_reply = ep->fec_mii_data; /* result from phy */ </FONT>
<FONT COLOR="#000000">ep->fec_ievent = FEC_ENET_MII; /* clear MII complete */ </FONT>
<FONT COLOR="#000000">#if 0 </FONT>
<FONT COLOR="#000000">printf("%s[%d] %s: sent=0x%8.8x, reply=0x%8.8x\n", </FONT>
<FONT COLOR="#000000">__FILE__,__LINE__,__FUNCTION__,mii_cmd,mii_reply); </FONT>
<FONT COLOR="#000000">#endif </FONT>
<FONT COLOR="#000000">return (mii_reply & 0xffff); /* data read from phy */ </FONT>
<FONT COLOR="#000000">} </FONT>
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