LAN8720A and imx6ul

tanvi_desai — Thu, 23 Mar 2017 04:56:36 GMT

Hello,

I configured a LAN8720 phy with imx6UL custom board and it is working fine in kernel but in u-boot it is showing following error:

Net: FEC MXC: board_eth_init:failed
Board Net Initialization Failed
No ethernet found.

I did following configuration in u-boot:

imx6ulevk.c

#define ENET_PAD_CTRL ( PAD_CTL_SRE_SLOW | PAD_CTL_SPEED_MED | \
PAD_CTL_HYS | PAD_CTL_PUS_100K_UP | \
PAD_CTL_DSE_40ohm )

#define ENET_CLK_PAD_CTRL ( PAD_CTL_SRE_FAST | PAD_CTL_DSE_40ohm | \
PAD_CTL_SPEED_MED | \
PAD_CTL_PUS_100K_UP | PAD_CTL_HYS )

static iomux_v3_cfg_t const fec1_pads[] = {
MX6_PAD_ENET2_RX_DATA0__ENET1_MDIO | MUX_PAD_CTRL(ENET_PAD_CTRL),
MX6_PAD_ENET2_RX_DATA1__ENET1_MDC | MUX_PAD_CTRL(ENET_PAD_CTRL),
MX6_PAD_ENET1_TX_DATA0__ENET1_TDATA00 | MUX_PAD_CTRL(ENET_PAD_CTRL),
MX6_PAD_ENET1_TX_DATA1__ENET1_TDATA01 | MUX_PAD_CTRL(ENET_PAD_CTRL),
MX6_PAD_ENET1_TX_EN__ENET1_TX_EN | MUX_PAD_CTRL(ENET_PAD_CTRL),
MX6_PAD_ENET1_TX_CLK__ENET1_REF_CLK1 | MUX_PAD_CTRL(ENET_CLK_PAD_CTRL),
MX6_PAD_ENET1_RX_DATA0__ENET1_RDATA00 | MUX_PAD_CTRL(ENET_PAD_CTRL),
MX6_PAD_ENET1_RX_DATA1__ENET1_RDATA01 | MUX_PAD_CTRL(ENET_PAD_CTRL),
MX6_PAD_ENET1_RX_ER__ENET1_RX_ER | MUX_PAD_CTRL(ENET_PAD_CTRL),
MX6_PAD_ENET1_RX_EN__ENET1_RX_EN | MUX_PAD_CTRL(ENET_PAD_CTRL),
MX6_PAD_SNVS_TAMPER6__GPIO5_IO06 | MUX_PAD_CTRL(ENET_PAD_CTRL),
MX6_PAD_SNVS_TAMPER5__GPIO5_IO05 | MUX_PAD_CTRL(ENET_PAD_CTRL),
};

static void setup_iomux_fec(int fec_id){
if (fec_id == 0){
imx_iomux_v3_setup_multiple_pads(fec1_pads,ARRAY_SIZE(fec1_pads));
}
else
printf("Warning: FEC ID 2 is NOT supported on J2 Board\n");
}

int board_eth_init(bd_t *bis){
struct iomuxc *const iomuxc_regs = (struct iomuxc *)IOMUXC_BASE_ADDR;
int reg,ret;

setup_iomux_fec(0);
gpio_direction_output(IMX_GPIO_NR(5, 6) , 0);

reg = readl(&iomuxc_regs->gpr[1]);
reg |= IOMUXC_GPR1_ENET_CLK_SEL_MASK;
writel(reg, &iomuxc_regs->gpr[1]);

ret = enable_fec_anatop_clock(0, ENET_50MHZ);
if (ret)
return ret;

enable_enet_clk(1);

mdelay(30);
gpio_set_value(IMX_GPIO_NR(5, 6), 1);

ret = cpu_eth_init(bis);
if (ret)
printf("FEC MXC: %s:failed\n", __func__);

return ret;
}

int board_phy_config(struct phy_device *phydev){
if (phydev->drv->config)
phydev->drv->config(phydev);

return 0;
}

imx6ulevk.h

#define CONFIG_FEC_MXC
#define CONFIG_MII
#define CONFIG_FEC_ENET_DEV 0

#if (CONFIG_FEC_ENET_DEV == 0)
#define IMX_FEC_BASE ENET_BASE_ADDR
#define CONFIG_FEC_MXC_PHYADDR 0x2
#define CONFIG_FEC_XCV_TYPE RMII
#endif
#define CONFIG_ETHPRIME "FEC"

#define CONFIG_PHYLIB
#define CONFIG_PHY_SMSC

Re: LAN8720A and imx6ul

igorpadykov — Thu, 23 Mar 2017 07:10:07 GMT

Hi Tanvi

please check uboot lan8720 init codes on

i.MX6UL ENET1 (with LAN8720A PHY) working in Uboot but not in Linux

Best regards
igor
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Re: LAN8720A and imx6ul

tanvi_desai — Thu, 23 Mar 2017 09:10:54 GMT

I tried that but still it was giving following error:

Net: FEC0 MXC: board_eth_init:failed
No ethernet found.

Regards,

Tanvi

Re: LAN8720A and imx6ul

igorpadykov — Thu, 23 Mar 2017 09:49:21 GMT

could you check with oscilloscope if there is clock and data signals.

Best regards
igor

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