Ethernet PHY not found - u-boot migration

[philippeleduc]

Hello,

I am using a custom board derived from the Sabre Smart Device from Freescale. I managed to adapt the 2014 version of u-boot to start the board. The system start correctly, but there is a problem with our PHY (which is of course different than the sabre SDB one).

Here is the output of u-boot :

U-Boot 2014.10-rc2 (Oct 01 2014 - 10:24:31)

CPU:   Freescale i.MX6SOLO rev1.1 at 792 MHz

Reset cause: WDOG

Board: MX6S-Vendome

I2C:   ready

DRAM:  512 MiB

MMC:   FSL_SDHC: 0

No panel detected: default to Hannstar-XGA

Display: Hannstar-XGA (1024x768)

In:    serial

Out:   serial

Err:   serial

PMIC:  PFUZE100 ID=0x10

Net:   Phy not found

PHY reset timed out

FEC [PRIME]

Hit any key to stop autoboot:  0

=> ping 192.1.1.48

Using FEC device

ARP Retry count exceeded; starting again

ARP Retry count exceeded; starting again

ARP Retry count exceeded; starting again

ARP Retry count exceeded; starting again

ARP Retry count exceeded; starting again

Abort

ping failed; host 192.1.1.48 is not alive

=> mii info

PHY 0x00: OUI = 0x5043, Model = 0x22, Rev = 0x02, 100baseT, FDX

=> mii dump 0 0

0.     (3100)                 -- PHY control register --

  (8000:0000) 0.15    =     0    reset

  (4000:0000) 0.14    =     0    loopback

  (2040:2000) 0. 6,13 =   b01    speed selection = 100 Mbps

  (1000:1000) 0.12    =     1    A/N enable

  (0800:0000) 0.11    =     0    power-down

  (0400:0000) 0.10    =     0    isolate

  (0200:0000) 0. 9    =     0    restart A/N

  (0100:0100) 0. 8    =     1    duplex = full

  (0080:0000) 0. 7    =     0    collision test enable

  (003f:0000) 0. 5- 0 =     0    (reserved)

In u-boot 2009, the code of the PHY is very close to the sabre SDB one. Only the "mx6_rgmii_rework" need to be modified. here is the old code:

int mx6_rgmii_rework(char *devname, int phy_addr)

{

  unsigned short val;

#if 0

  /* To enable AR8031 ouput a 125MHz clk from CLK_25M */

  phy_write(devname, phy_addr, 0xd, 0x7);

  phy_write(devname, phy_addr, 0xe, 0x8016);

  phy_write(devname, phy_addr, 0xd, 0x4007);

  phy_read(devname, phy_addr, 0xe, &val);

  val &= 0xffe3;

  val |= 0x18;

  phy_write(devname, phy_addr, 0xe, val);

  /* introduce tx clock delay */

  phy_write(devname, phy_addr, 0x1d, 0x5);

  phy_read(devname, phy_addr, 0x1e, &val);

  val |= 0x0100;

  phy_write(devname, phy_addr, 0x1e, val);

#endif

}

// FJ disable crossover cable detection

  phy_read(devname, phy_addr, 0x10, &val);

  val &= 0xFFCF;

  phy_write(devname, phy_addr, 0x10, val);

  return 0;

}

I do not know what to look for to resolve this problem...

Thank you in advance for your help !

[philippeleduc]

Hi,

> Uboot does not find the phy where you provided a phy address.

> If your phy is at 0x00  (for mdio) then make sure

> you configure uboot accordingly so that it finds your phy.

Thank you for the tips! That was the problem: in our old uboot, it was configured to 'discover' the PHY, in the new one, the address is set at 1 (and our PHY address is 0). It is working like a charm now (even with a fake MAC :smileyhappy:).

FI, the PHY is a Marvell  88E3019.

Thank you again for your help (I was getting mad yesterday ^^').

Regards,

Philippe Leduc

[fabio_estevam]

What is the PHY you use on your board?

[sinanakman · Accepted solution]

Hi Philippe

There is maybe two separate issues :

>Net:   Phy not found

>PHY reset timed out

Uboot does not find the phy where you provided a phy address.

If your phy is at 0x00  (for mdio) then make sure

you configure uboot accordingly so that it finds your phy.

Also, how are you setting the mac address in uboot. If

you are providing some fake mac addresses this might

cause the ARP errors you are seeing.

Hope this helps

Sinan Akman