Add Ethernet and networking support on uDoo board (FEC +phy Micrel KSZ9031). Ethernet speed is currently limited to 10/100Mbps.
Signed-off-by: Giuseppe Pagano giuseppe.pagano@seco.com Tested-by: Fabio Estevam fabio.estevam@freescale.com CC: Stefano Babic sbabic@denx.de CC: Fabio Estevam fabio.estevam@freescale.com ---
Changes in v2: - Improve description and comment. - uDoo does not works well with Gigabit switches, as workaround speed will be limited to 10/100Mbps. - use defines instead of hard coded values for KSZ9031 register address.
board/udoo/udoo.c | 140 ++++++++++++++++++++++++++++++++++++++++++++++++ include/configs/udoo.h | 16 ++++++ include/micrel.h | 5 ++ 3 files changed, 161 insertions(+)
diff --git a/board/udoo/udoo.c b/board/udoo/udoo.c index e9d6375..0c38d9b 100644 --- a/board/udoo/udoo.c +++ b/board/udoo/udoo.c @@ -9,6 +9,7 @@ #include <asm/arch/clock.h> #include <asm/arch/imx-regs.h> #include <asm/arch/iomux.h> +#include <malloc.h> #include <asm/arch/mx6-pins.h> #include <asm/errno.h> #include <asm/gpio.h> @@ -18,6 +19,9 @@ #include <asm/arch/crm_regs.h> #include <asm/io.h> #include <asm/arch/sys_proto.h> +#include <micrel.h> +#include <miiphy.h> +#include <netdev.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -25,6 +29,9 @@ DECLARE_GLOBAL_DATA_PTR; PAD_CTL_SPEED_MED | PAD_CTL_DSE_40ohm | \ PAD_CTL_SRE_FAST | PAD_CTL_HYS)
+#define ENET_PAD_CTRL (PAD_CTL_PUS_100K_UP | \ + PAD_CTL_SPEED_MED | PAD_CTL_DSE_40ohm | PAD_CTL_HYS) + #define USDHC_PAD_CTRL (PAD_CTL_PUS_47K_UP | \ PAD_CTL_SPEED_LOW | PAD_CTL_DSE_80ohm | \ PAD_CTL_SRE_FAST | PAD_CTL_HYS) @@ -58,6 +65,99 @@ static iomux_v3_cfg_t const wdog_pads[] = { MX6_PAD_EIM_D19__GPIO_3_19, };
+int mx6_rgmii_rework(struct phy_device *phydev) +{ + /* + * Bug: Apparently uDoo does not works with Gigabit switches... + * Limiting speed to 10/100Mbps, and setting master mode, seems to + * be the only way to have a successfull PHY auto negotiation. + * How to fix: Understand why Linux kernel do not have this issue. + */ + phy_write(phydev, MDIO_DEVAD_NONE, MII_CTRL1000, 0x1c00); + + /* control data pad skew - devaddr = 0x02, register = 0x04 */ + ksz9031_phy_extended_write(phydev, 0x02, + MII_KSZ9031_EXT_RGMII_CTRL_SIG_SKEW, + MII_KSZ9031_MOD_DATA_NO_POST_INC, 0x0000); + /* rx data pad skew - devaddr = 0x02, register = 0x05 */ + ksz9031_phy_extended_write(phydev, 0x02, + MII_KSZ9031_EXT_RGMII_RX_DATA_SKEW, + MII_KSZ9031_MOD_DATA_NO_POST_INC, 0x0000); + /* tx data pad skew - devaddr = 0x02, register = 0x05 */ + ksz9031_phy_extended_write(phydev, 0x02, + MII_KSZ9031_EXT_RGMII_TX_DATA_SKEW, + MII_KSZ9031_MOD_DATA_NO_POST_INC, 0x0000); + /* gtx and rx clock pad skew - devaddr = 0x02, register = 0x08 */ + ksz9031_phy_extended_write(phydev, 0x02, + MII_KSZ9031_EXT_RGMII_CLOCK_SKEW, + MII_KSZ9031_MOD_DATA_NO_POST_INC, 0x03FF); + return 0; +} + +static iomux_v3_cfg_t const enet_pads1[] = { + 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_RGMII_TXC__ENET_RGMII_TXC | MUX_PAD_CTRL(ENET_PAD_CTRL), + MX6_PAD_RGMII_TD0__ENET_RGMII_TD0 | MUX_PAD_CTRL(ENET_PAD_CTRL), + MX6_PAD_RGMII_TD1__ENET_RGMII_TD1 | MUX_PAD_CTRL(ENET_PAD_CTRL), + MX6_PAD_RGMII_TD2__ENET_RGMII_TD2 | MUX_PAD_CTRL(ENET_PAD_CTRL), + MX6_PAD_RGMII_TD3__ENET_RGMII_TD3 | MUX_PAD_CTRL(ENET_PAD_CTRL), + MX6_PAD_RGMII_TX_CTL__RGMII_TX_CTL | MUX_PAD_CTRL(ENET_PAD_CTRL), + MX6_PAD_ENET_REF_CLK__ENET_TX_CLK | MUX_PAD_CTRL(ENET_PAD_CTRL), + MX6_PAD_RGMII_RXC__ENET_RGMII_RXC | MUX_PAD_CTRL(ENET_PAD_CTRL), + /* RGMII reset */ + MX6_PAD_EIM_D23__GPIO_3_23 | MUX_PAD_CTRL(NO_PAD_CTRL), + /* Ethernet power supply */ + MX6_PAD_EIM_EB3__GPIO_2_31 | MUX_PAD_CTRL(NO_PAD_CTRL), + /* pin 32 - 1 - (MODE0) all */ + MX6_PAD_RGMII_RD0__GPIO_6_25 | MUX_PAD_CTRL(NO_PAD_CTRL), + /* pin 31 - 1 - (MODE1) all */ + MX6_PAD_RGMII_RD1__GPIO_6_27 | MUX_PAD_CTRL(NO_PAD_CTRL), + /* pin 28 - 1 - (MODE2) all */ + MX6_PAD_RGMII_RD2__GPIO_6_28 | MUX_PAD_CTRL(NO_PAD_CTRL), + /* pin 27 - 1 - (MODE3) all */ + MX6_PAD_RGMII_RD3__GPIO_6_29 | MUX_PAD_CTRL(NO_PAD_CTRL), + /* pin 33 - 1 - (CLK125_EN) 125Mhz clockout enabled */ + MX6_PAD_RGMII_RX_CTL__GPIO_6_24 | MUX_PAD_CTRL(NO_PAD_CTRL), +}; + +static iomux_v3_cfg_t const enet_pads2[] = { + MX6_PAD_RGMII_RD0__ENET_RGMII_RD0 | MUX_PAD_CTRL(ENET_PAD_CTRL), + MX6_PAD_RGMII_RD1__ENET_RGMII_RD1 | MUX_PAD_CTRL(ENET_PAD_CTRL), + MX6_PAD_RGMII_RD2__ENET_RGMII_RD2 | MUX_PAD_CTRL(ENET_PAD_CTRL), + MX6_PAD_RGMII_RD3__ENET_RGMII_RD3 | MUX_PAD_CTRL(ENET_PAD_CTRL), + MX6_PAD_RGMII_RX_CTL__RGMII_RX_CTL | MUX_PAD_CTRL(ENET_PAD_CTRL), +}; + +static void setup_iomux_enet(void) +{ + imx_iomux_v3_setup_multiple_pads(enet_pads1, ARRAY_SIZE(enet_pads1)); + udelay(20); + gpio_direction_output(IMX_GPIO_NR(2, 31), 1); /* Power supply on */ + + gpio_direction_output(IMX_GPIO_NR(3, 23), 0); /* assert PHY rst */ + + gpio_direction_output(IMX_GPIO_NR(6, 24), 1); + gpio_direction_output(IMX_GPIO_NR(6, 25), 1); + gpio_direction_output(IMX_GPIO_NR(6, 27), 1); + gpio_direction_output(IMX_GPIO_NR(6, 28), 1); + gpio_direction_output(IMX_GPIO_NR(6, 29), 1); + udelay(1000); + + gpio_set_value(IMX_GPIO_NR(3, 23), 1); /* deassert PHY rst */ + + /* Need 100ms delay to exit from reset. */ + udelay(1000 * 100); + + gpio_free(IMX_GPIO_NR(6, 24)); + gpio_free(IMX_GPIO_NR(6, 25)); + gpio_free(IMX_GPIO_NR(6, 27)); + gpio_free(IMX_GPIO_NR(6, 28)); + gpio_free(IMX_GPIO_NR(6, 29)); + + imx_iomux_v3_setup_multiple_pads(enet_pads2, ARRAY_SIZE(enet_pads2)); +} + static void setup_iomux_uart(void) { imx_iomux_v3_setup_multiple_pads(uart2_pads, ARRAY_SIZE(uart2_pads)); @@ -77,6 +177,37 @@ int board_mmc_getcd(struct mmc *mmc) return 1; /* Always present */ }
+int board_eth_init(bd_t *bis) +{ + uint32_t base = IMX_FEC_BASE; + struct mii_dev *bus = NULL; + struct phy_device *phydev = NULL; + int ret; + + setup_iomux_enet(); + +#ifdef CONFIG_FEC_MXC + bus = fec_get_miibus(base, -1); + if (!bus) + return 0; + /* scan phy 4,5,6,7 */ + phydev = phy_find_by_mask(bus, (0xf << 4), PHY_INTERFACE_MODE_RGMII); + + if (!phydev) { + free(bus); + return 0; + } + printf("using phy at %d\n", phydev->addr); + ret = fec_probe(bis, -1, base, bus, phydev); + if (ret) { + printf("FEC MXC: %s:failed\n", __func__); + free(phydev); + free(bus); + } +#endif + return 0; +} + int board_mmc_init(bd_t *bis) { imx_iomux_v3_setup_multiple_pads(usdhc3_pads, ARRAY_SIZE(usdhc3_pads)); @@ -94,6 +225,15 @@ int board_early_init_f(void) return 0; }
+int board_phy_config(struct phy_device *phydev) +{ + mx6_rgmii_rework(phydev); + if (phydev->drv->config) + phydev->drv->config(phydev); + + return 0; +} + int board_init(void) { /* address of boot parameters */ diff --git a/include/configs/udoo.h b/include/configs/udoo.h index 78df071..b9a493c 100644 --- a/include/configs/udoo.h +++ b/include/configs/udoo.h @@ -34,6 +34,22 @@ #define CONFIG_MXC_UART #define CONFIG_MXC_UART_BASE UART2_BASE
+/* Network support */ + +#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 RGMII +#define CONFIG_ETHPRIME "FEC" +#define CONFIG_FEC_MXC_PHYADDR 6 +#define CONFIG_PHYLIB +#define CONFIG_PHY_MICREL +#define CONFIG_PHY_MICREL_KSZ9031 + /* allow to overwrite serial and ethaddr */ #define CONFIG_ENV_OVERWRITE #define CONFIG_CONS_INDEX 1 diff --git a/include/micrel.h b/include/micrel.h index e1c62d8..1d72b50 100644 --- a/include/micrel.h +++ b/include/micrel.h @@ -15,6 +15,11 @@ #define MII_KSZ9031_MOD_DATA_POST_INC_RW 0x8000 #define MII_KSZ9031_MOD_DATA_POST_INC_W 0xC000
+#define MII_KSZ9031_EXT_RGMII_CTRL_SIG_SKEW 0x4 +#define MII_KSZ9031_EXT_RGMII_RX_DATA_SKEW 0x5 +#define MII_KSZ9031_EXT_RGMII_TX_DATA_SKEW 0x6 +#define MII_KSZ9031_EXT_RGMII_CLOCK_SKEW 0x8 + struct phy_device; int ksz9021_phy_extended_write(struct phy_device *phydev, int regnum, u16 val); int ksz9021_phy_extended_read(struct phy_device *phydev, int regnum);