i.mx6q: arm2: Add the enet function support

This enable the network function on the i.mx6q armadillo2
board(arm2), thus we can use tftp to load image from network.

Cc: Stefano Babic <sbabic@denx.de>
Signed-off-by: Jason Liu <jason.hui@linaro.org>
Tested-by: Dirk Behme <dirk.behme@de.bosch.com>

board/freescale/mx6qarm2/mx6qarm2.c

@@ -29,6 +29,8 @@
 #include <asm/gpio.h>
 #include <mmc.h>
 #include <fsl_esdhc.h>
+#include <miiphy.h>
+#include <netdev.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -40,6 +42,10 @@ DECLARE_GLOBAL_DATA_PTR;
 	PAD_CTL_PUS_47K_UP  | PAD_CTL_SPEED_LOW |		\
 	PAD_CTL_DSE_80ohm   | PAD_CTL_SRE_FAST  | PAD_CTL_HYS)
 
+#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)
+
 int dram_init(void)
 {
 	gd->ram_size = get_ram_size((void *)PHYS_SDRAM, PHYS_SDRAM_SIZE);
@@ -79,11 +85,35 @@ iomux_v3_cfg_t usdhc4_pads[] = {
 	MX6Q_PAD_SD4_DAT7__USDHC4_DAT7 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
 };
 
+iomux_v3_cfg_t enet_pads[] = {
+	MX6Q_PAD_KEY_COL1__ENET_MDIO        | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6Q_PAD_KEY_COL2__ENET_MDC         | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6Q_PAD_RGMII_TXC__ENET_RGMII_TXC  | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6Q_PAD_RGMII_TD0__ENET_RGMII_TD0  | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6Q_PAD_RGMII_TD1__ENET_RGMII_TD1  | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6Q_PAD_RGMII_TD2__ENET_RGMII_TD2  | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6Q_PAD_RGMII_TD3__ENET_RGMII_TD3  | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6Q_PAD_RGMII_TX_CTL__RGMII_TX_CTL | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6Q_PAD_ENET_REF_CLK__ENET_TX_CLK  | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6Q_PAD_RGMII_RXC__ENET_RGMII_RXC  | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6Q_PAD_RGMII_RD0__ENET_RGMII_RD0  | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6Q_PAD_RGMII_RD1__ENET_RGMII_RD1  | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6Q_PAD_RGMII_RD2__ENET_RGMII_RD2  | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6Q_PAD_RGMII_RD3__ENET_RGMII_RD3  | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6Q_PAD_RGMII_RX_CTL__RGMII_RX_CTL | MUX_PAD_CTRL(ENET_PAD_CTRL),
+};
+
+
 static void setup_iomux_uart(void)
 {
 	imx_iomux_v3_setup_multiple_pads(uart4_pads, ARRAY_SIZE(uart4_pads));
 }
 
+static void setup_iomux_enet(void)
+{
+	imx_iomux_v3_setup_multiple_pads(enet_pads, ARRAY_SIZE(enet_pads));
+}
+
 #ifdef CONFIG_FSL_ESDHC
 struct fsl_esdhc_cfg usdhc_cfg[2] = {
 	{USDHC3_BASE_ADDR, 1},
@@ -132,9 +162,69 @@ int board_mmc_init(bd_t *bis)
 }
 #endif
 
+#define MII_MMD_ACCESS_CTRL_REG		0xd
+#define MII_MMD_ACCESS_ADDR_DATA_REG	0xe
+#define MII_DBG_PORT_REG		0x1d
+#define MII_DBG_PORT2_REG		0x1e
+
+int fecmxc_mii_postcall(int phy)
+{
+	unsigned short val;
+
+	/*
+	 * Due to the i.MX6Q Armadillo2 board HW design,there is
+	 * no 125Mhz clock input from SOC. In order to use RGMII,
+	 * We need enable AR8031 ouput a 125MHz clk from CLK_25M
+	 */
+	miiphy_write("FEC", phy, MII_MMD_ACCESS_CTRL_REG, 0x7);
+	miiphy_write("FEC", phy, MII_MMD_ACCESS_ADDR_DATA_REG, 0x8016);
+	miiphy_write("FEC", phy, MII_MMD_ACCESS_CTRL_REG, 0x4007);
+	miiphy_read("FEC", phy, MII_MMD_ACCESS_ADDR_DATA_REG, &val);
+	val &= 0xffe3;
+	val |= 0x18;
+	miiphy_write("FEC", phy, MII_MMD_ACCESS_ADDR_DATA_REG, val);
+
+	/* For the RGMII phy, we need enable tx clock delay */
+	miiphy_write("FEC", phy, MII_DBG_PORT_REG, 0x5);
+	miiphy_read("FEC", phy, MII_DBG_PORT2_REG, &val);
+	val |= 0x0100;
+	miiphy_write("FEC", phy, MII_DBG_PORT2_REG, val);
+
+	miiphy_write("FEC", phy, MII_BMCR, 0xa100);
+
+	return 0;
+}
+
+int board_eth_init(bd_t *bis)
+{
+	struct eth_device *dev;
+	int ret;
+
+	ret = cpu_eth_init(bis);
+	if (ret) {
+		printf("FEC MXC: %s:failed\n", __func__);
+		return ret;
+	}
+
+	dev = eth_get_dev_by_name("FEC");
+	if (!dev) {
+		printf("FEC MXC: Unable to get FEC device entry\n");
+		return -EINVAL;
+	}
+
+	ret = fecmxc_register_mii_postcall(dev, fecmxc_mii_postcall);
+	if (ret) {
+		printf("FEC MXC: Unable to register FEC mii postcall\n");
+		return ret;
+	}
+
+	return 0;
+}
+
 int board_early_init_f(void)
 {
 	setup_iomux_uart();
+	setup_iomux_enet();
 
 	return 0;
 }

include/configs/mx6qarm2.h

@@ -56,6 +56,16 @@
 #define CONFIG_CMD_FAT
 #define CONFIG_DOS_PARTITION
 
+#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_FEC_MXC_PHYADDR		0
+
 /* allow to overwrite serial and ethaddr */
 #define CONFIG_ENV_OVERWRITE
 #define CONFIG_CONS_INDEX		1
@@ -66,8 +76,6 @@
 #include <config_cmd_default.h>
 
 #undef CONFIG_CMD_IMLS
-#undef CONFIG_CMD_NET
-#undef CONFIG_CMD_NFS
 
 #define CONFIG_BOOTDELAY		3