[U-Boot] imx6 Solo and LAN8720

[Andy Ng]

An update:
I have enabled debug in the u-boot and I get the following error:

fec_send: status 0x8c00 index 0 ret -22




On Thu, Jan 16, 2014 at 9:37 PM, Andy Ng <andreas2025 at gmail.com> wrote:

> Dear colleagues,
>
> I have setup a LAN8720 phy for my imx6Solo/DL custom board but no packets
> coming out.
> I can see 50MHz going into the phy from the REF_OUT Pin of the SOLO, I can
> read the phy ID using the u-boot MDIO commands
> but  when I do ftp or ping nothing comes out.
>
> mx6s > mdio list
> FEC:
> 0 - SMSC LAN8710/LAN8720 <--> FEC
>
>
> For this design I am using ENET_ANATOP_ETHERNET_REF_OUT.
> Have you used LAN8720 in a similar configuration:
>
> The pinmux i have is the following:
>
> /*
>  * Ethernet PINS for LAN8720
>  */
> static iomux_v3_cfg_t const enet_pads[] = {
>     MX6_PAD_ENET_MDIO__ENET_MDIO        | MUX_PAD_CTRL(ENET_PAD_CTRL),
>     MX6_PAD_ENET_MDC__ENET_MDC        | MUX_PAD_CTRL(ENET_PAD_CTRL),
>     MX6_PAD_ENET_CRS_DV__ENET_RX_EN        | MUX_PAD_CTRL(ENET_PAD_CTRL),
>     MX6_PAD_GPIO_16__ENET_ANATOP_ETHERNET_REF_OUT     |
> MUX_PAD_CTRL(ENET_PAD_CTRL),
>     MX6_PAD_ENET_RX_ER__ENET_RX_ER        | MUX_PAD_CTRL(ENET_PAD_CTRL),
>     MX6_PAD_ENET_TX_EN__ENET_TX_EN        | MUX_PAD_CTRL(ENET_PAD_CTRL),
>     MX6_PAD_ENET_RXD0__ENET_RDATA_0        | MUX_PAD_CTRL(ENET_PAD_CTRL),
>     MX6_PAD_ENET_RXD1__ENET_RDATA_1        | MUX_PAD_CTRL(ENET_PAD_CTRL),
>     MX6_PAD_ENET_TXD0__ENET_TDATA_0        | MUX_PAD_CTRL(ENET_PAD_CTRL),
>     MX6_PAD_ENET_TXD1__ENET_TDATA_1        | MUX_PAD_CTRL(ENET_PAD_CTRL),
>     /* LAN8720 PHY Reset */
>     MX6_PAD_SD4_DAT1__GPIO_2_9         | MUX_PAD_CTRL(NO_PAD_CTRL),
>         /* Note: The INT is not handled */
>     MX6_PAD_ENET_REF_CLK__GPIO_1_23        | MUX_PAD_CTRL(NO_PAD_CTRL),
>
> };
>
> Where ENET_PAT_CTRL is set as:
>
> #define ENET_PAD_CTRL  (PAD_CTL_PKE | PAD_CTL_PUE |             \
>     PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED   |             \
>     PAD_CTL_DSE_40ohm   | PAD_CTL_HYS)
>
> And the Ethernet configuration in the config file as follows:
>
> /* Ethernet Configuration */
> #define CONFIG_CMD_PING
> #define CONFIG_CMD_DHCP
> #define CONFIG_CMD_MII
> #define CONFIG_CMD_NET
> #define CONFIG_FEC_MXC
> #define CONFIG_MII
> #define IMX_FEC_BASE            ENET_BASE_ADDR
> #define CONFIG_FEC_XCV_TYPE        RMII
> #define CONFIG_ETHPRIME                 "FEC"
> #define CONFIG_FEC_MXC_PHYADDR        0
>
> #define CONFIG_PHYLIB
> #define CONFIG_PHY_SMSC
>
>
> In the board file:
>
> #ifdef CONFIG_FEC_MXC
>
> /*
>  * Initialise the pins, and reset the PHY
>  */
> static void setup_iomux_enet(void)
> {
>     imx_iomux_v3_setup_multiple_pads(enet_pads, ARRAY_SIZE(enet_pads));
>
>     /* Reset LAN8720 PHY */
>     gpio_direction_output(ETH_PHY_RESET, 1);
>     udelay(150);
>     gpio_set_value(ETH_PHY_RESET, 0);
>     udelay(150);
>     gpio_set_value(ETH_PHY_RESET, 1);
>     udelay(200);
> }
>
>
> int enable_fec_anatop_clock(void)
> {
>     u32 reg = 0;
>     s32 timeout = 100000;
>
>     struct anatop_regs __iomem *anatop =
>         (struct anatop_regs __iomem *)ANATOP_BASE_ADDR;
>
>     reg = readl(&anatop->pll_enet);
>     if ((reg & BM_ANADIG_PLL_ENET_POWERDOWN) ||
>         (!(reg & BM_ANADIG_PLL_ENET_LOCK))) {
>         reg &= ~BM_ANADIG_PLL_ENET_POWERDOWN;
>         writel(reg, &anatop->pll_enet);
>         while (timeout--) {
>             if (readl(&anatop->pll_enet) & BM_ANADIG_PLL_ENET_LOCK)
>                 break;
>         }
>         if (timeout < 0)
>             return -ETIMEDOUT;
>     }
>
>     /* Enable FEC clock */
>     reg |= BM_ANADIG_PLL_ENET_ENABLE;
>     reg &= ~BM_ANADIG_PLL_ENET_BYPASS;
>     writel(reg, &anatop->pll_enet);
>
>     return 0;
> }
>
> int board_eth_init(bd_t *bis)
> {
>     int ret;
>
>     setup_iomux_enet();
>
>     ret = cpu_eth_init(bis);
>     if (ret) {
>         printf("FEC MXC: %s:failed\n", __func__);
>         return ret;
>     }
>
>     return 0;
> }
>
>
> static int setup_fec(void)
> {
>     struct iomuxc_base_regs *iomuxc_regs =
>                 (struct iomuxc_base_regs *)IOMUXC_BASE_ADDR;
>     int ret;
>
>     /* set gpr1[21] to select anatop clock */
>     clrsetbits_le32(&iomuxc_regs->gpr[1], IOMUXC_GPR1_ENET_CLK_SEL_MASK, 1
> << 21);
>
>     ret = enable_fec_anatop_clock();
>     if (ret)
>         return ret;
>
>     return 0;
> }
> #endif
>
> int board_late_init(void)
> {
> #ifdef CONFIG_CMD_BMODE
>     add_board_boot_modes(board_boot_modes);
> #endif
>
>     return 0;
> }
>
> int board_init(void)
> {
>     /* address of boot parameters */
>     gd->bd->bi_boot_params = PHYS_SDRAM + 0x100;
>
>     /* Read the board ID */
>
>     /* Setup the FEC clock */
> #ifdef    CONFIG_FEC_MXC
>     setup_fec();
> #endif
>
>     return 0;
> }
>
>
> The clock gating are as:
> /* set the default clock gate to save power */
> DATA 4, CCM_CCGR0, 0x00C03F3F
> DATA 4, CCM_CCGR1, 0x0030FC03
> DATA 4, CCM_CCGR2, 0x0FFFC000
> DATA 4, CCM_CCGR3, 0x3FF00000
> DATA 4, CCM_CCGR4, 0x00FFF300
> DATA 4, CCM_CCGR5, 0x0F0000C3
> DATA 4, CCM_CCGR6, 0x000003FF
>
> /* enable AXI cache for VDOA/VPU/IPU */
> DATA 4, MX6_IOMUXC_GPR4, 0xF00000CF
> /* set IPU AXI-id0 Qos=0xf(bypass) AXI-id1 Qos=0x7 */
> DATA 4, MX6_IOMUXC_GPR6, 0x007F007F
> DATA 4, MX6_IOMUXC_GPR7, 0x007F007F
>
> /*
>  * Setup CCM_CCOSR register as follows:
>  *
>  * cko1_en  = 1       --> CKO1 enabled
>  * cko1_div = 111  --> divide by 8
>  * cko1_sel = 1011 --> ahb_clk_root
>  *
>  * This sets CKO1 at ahb_clk_root/8 = 132/8 = 16.5 MHz
>  */
> DATA 4, CCM_CCOSR, 0x000000fb
>
>
> The ethaddr: ethaddr=02:24:08:32:68:08
>
> Any assistance will be very much appreciated.
> Thank you.
> A
>
>