[U-Boot] [PATCH v2 1/4] udoo: Add ethernet support (FEC + Micrel KSZ9031).
Giuseppe Pagano
giuseppe.pagano at seco.com
Fri Nov 15 17:42:51 CET 2013
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 at seco.com>
Tested-by: Fabio Estevam <fabio.estevam at freescale.com>
CC: Stefano Babic <sbabic at denx.de>
CC: Fabio Estevam <fabio.estevam at 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);
--
1.7.10.4
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