Hi,
I have a U-Boot 2009.08 and want to get it running on our board with iMX6q. The board has a rmii ethernet interface which I try to get running.
This uboot already runs on another board with same processor...
This new board uses a dp83848 ethernet phy. Phy is connected to the ENET interface of imx6q:
MX6Q_PAD_ENET_MDIO__ENET_MDIO,
MX6Q_PAD_ENET_MDC__ENET_MDC,
MX6Q_PAD_RGMII_TX_CTL__ENET_ANATOP_ETHERNET_REF_OUT,
MX6Q_PAD_ENET_TX_EN__ENET_TX_EN,
MX6Q_PAD_ENET_TXD0__ENET_TDATA_0,
MX6Q_PAD_ENET_TXD1__ENET_TDATA_1,
MX6Q_PAD_ENET_CRS_DV__ENET_RX_EN,
MX6Q_PAD_ENET_RX_ER__ENET_RX_ER,
MX6Q_PAD_ENET_RXD0__ENET_RDATA_0,
MX6Q_PAD_ENET_RXD1__ENET_RDATA_1,
/* Phy Reset */
MX6Q_PAD_SD4_DAT2__GPIO_2_10,
I've already measured clock and MDC and MDIO. I have a 50Mhz clock at ETHERNET_REF_OUT and about 6Mhz on MDC. MDIO also toggles when writing to phy.
I don't understand why I don't get a TX_EN when I try to ping. I get: (lines with // are my printf's)
//fec_init - 1
//miiphy_read
//phy_read - addr: 0x1 reg: 0x0
miiphy_read
//phy_read - addr: 0x1 reg: 0x0
//setFecDuplexSpeed - 1
//setFecDuplexSpeed - PHY_BMCR: 0x3100
//setFecDuplexSpeed - DEFAULT dup_spd: 0x0000
//__fec_mii_write - reg: 0000 val: 3300
FEC: Link is Up 786d
//fec_init - set rcr to rmii mode: 0x5EE0104
//ENET_RCR 0x5EE0104
Using FEC0 device
//fec_send - length 42
//fec_send - Link OK
TX timeout packet at 27857080
//fec_send - length 42
//fec_send - Link OK
TX timeout packet at 27857080
//fec_send - length 42
//fec_send - Link OK
TX not ready
TX timeout packet at 27857080
//fec_send - length 42
//fec_send - Link OK
TX not ready
TX timeout packet at 27857080
//fec_send - length 42
//fec_send - Link OK
TX not ready
TX timeout packet at 27857080
ping failed; host 10.0.0.84 is not alive
I also have a function called "enet_board_init" where I first initialize the pad config and then reset the Phy. After that I set the pll config of the ETHERNET_REF_OUT pin. So i get 50Mhz clock for phy.
Then I check if Phy is powered. With command mii info I can read from phy and it shows me the right address and model info. When I read back the registers of phy I see that it has no link. but anything else seems to be configured right.
Can someone tell me where the problem is? Im looking in the mxc_fec.c file where the problem could be. But I don't know how to configure the board and ethenet for uboot. I just have one Infopage Freescale Technical Information Center
but it is not very helpful. It is rather confusing...
Andi
