imx6: icorem6: Add ENET support

Add enet support for engicam icorem6 qdl starter kit.
- Add pinmux settings
- Add board_eth_init

TFTP log:
--------
Net:   FEC [PRIME]
Hit any key to stop autoboot:  0
icorem6qdl> tftpboot {fdt_addr} imx6dl-icore.dtb
Using FEC device
TFTP from server 192.168.2.96; our IP address is 192.168.2.75
Filename 'imx6dl-icore.dtb'.
Load address: 0x0
Loading: ######
         1.3 MiB/s
done
Bytes transferred = 28976 (7130 hex)
CACHE: Misaligned operation at range [00000000, 00007130]
icorem6qdl>

Cc: Joe Hershberger <joe.hershberger@ni.com>
Cc: Peng Fan <peng.fan@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Cc: Matteo Lisi <matteo.lisi@engicam.com>
Cc: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>

board/engicam/icorem6/icorem6.c

@@ -9,12 +9,15 @@
 #include <common.h>
 #include <fsl_esdhc.h>
 #include <mmc.h>
+#include <miiphy.h>
+#include <netdev.h>
 
 #include <asm/io.h>
 #include <asm/gpio.h>
 #include <linux/sizes.h>
 
 #include <asm/arch/clock.h>
+#include <asm/arch/crm_regs.h>
 #include <asm/arch/iomux.h>
 #include <asm/arch/mx6-pins.h>
 #include <asm/arch/sys_proto.h>
@@ -30,11 +33,28 @@ DECLARE_GLOBAL_DATA_PTR;
 	PAD_CTL_PUS_22K_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)
+
 static iomux_v3_cfg_t const uart4_pads[] = {
 	IOMUX_PADS(PAD_KEY_COL0__UART4_TX_DATA | MUX_PAD_CTRL(UART_PAD_CTRL)),
 	IOMUX_PADS(PAD_KEY_ROW0__UART4_RX_DATA | MUX_PAD_CTRL(UART_PAD_CTRL)),
 };
 
+static iomux_v3_cfg_t const enet_pads[] = {
+	IOMUX_PADS(PAD_ENET_CRS_DV__ENET_RX_EN | MUX_PAD_CTRL(ENET_PAD_CTRL)),
+	IOMUX_PADS(PAD_GPIO_16__ENET_REF_CLK | MUX_PAD_CTRL(ENET_PAD_CTRL | PAD_CTL_SRE_FAST)),
+	IOMUX_PADS(PAD_ENET_TX_EN__ENET_TX_EN | MUX_PAD_CTRL(ENET_PAD_CTRL)),
+	IOMUX_PADS(PAD_ENET_RXD1__ENET_RX_DATA1	| MUX_PAD_CTRL(ENET_PAD_CTRL)),
+	IOMUX_PADS(PAD_ENET_RXD0__ENET_RX_DATA0	| MUX_PAD_CTRL(ENET_PAD_CTRL)),
+	IOMUX_PADS(PAD_ENET_TXD1__ENET_TX_DATA1	| MUX_PAD_CTRL(ENET_PAD_CTRL)),
+	IOMUX_PADS(PAD_ENET_TXD0__ENET_TX_DATA0	| MUX_PAD_CTRL(ENET_PAD_CTRL)),
+	IOMUX_PADS(PAD_ENET_MDC__ENET_MDC | MUX_PAD_CTRL(ENET_PAD_CTRL)),
+	IOMUX_PADS(PAD_ENET_MDIO__ENET_MDIO | MUX_PAD_CTRL(ENET_PAD_CTRL)),
+	IOMUX_PADS(PAD_GPIO_17__GPIO7_IO12 | MUX_PAD_CTRL(NO_PAD_CTRL)),
+};
+
 static iomux_v3_cfg_t const usdhc1_pads[] = {
 	IOMUX_PADS(PAD_SD1_CLK__SD1_CLK	| MUX_PAD_CTRL(USDHC_PAD_CTRL)),
 	IOMUX_PADS(PAD_SD1_CMD__SD1_CMD	| MUX_PAD_CTRL(USDHC_PAD_CTRL)),
@@ -99,6 +119,58 @@ int board_mmc_init(bd_t *bis)
 }
 #endif
 
+#ifdef CONFIG_FEC_MXC
+#define ENET_PHY_RST		IMX_GPIO_NR(7, 12)
+static int setup_fec(void)
+{
+	struct mxc_ccm_reg *ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
+	struct anatop_regs *anatop = (struct anatop_regs *)ANATOP_BASE_ADDR;
+	s32 timeout = 100000;
+	u32 reg = 0;
+	int ret;
+
+	/* Enable fec clock */
+	setbits_le32(&ccm->CCGR1, MXC_CCM_CCGR1_ENET_MASK);
+
+	/* use 50MHz */
+	ret = enable_fec_anatop_clock(0, ENET_50MHZ);
+	if (ret)
+		return ret;
+
+	/* Enable PLLs */
+	reg = readl(&anatop->pll_enet);
+	reg &= ~BM_ANADIG_PLL_SYS_POWERDOWN;
+	writel(reg, &anatop->pll_enet);
+	reg = readl(&anatop->pll_enet);
+	reg |= BM_ANADIG_PLL_SYS_ENABLE;
+	while (timeout--) {
+		if (readl(&anatop->pll_enet) & BM_ANADIG_PLL_SYS_LOCK)
+			break;
+	}
+	if (timeout <= 0)
+		return -EIO;
+	reg &= ~BM_ANADIG_PLL_SYS_BYPASS;
+	writel(reg, &anatop->pll_enet);
+
+	/* reset the phy */
+	gpio_direction_output(ENET_PHY_RST, 0);
+	udelay(10000);
+	gpio_set_value(ENET_PHY_RST, 1);
+
+	return 0;
+}
+
+int board_eth_init(bd_t *bis)
+{
+	int ret;
+
+	SETUP_IOMUX_PADS(enet_pads);
+	setup_fec();
+
+	return ret = cpu_eth_init(bis);
+}
+#endif
+
 int board_early_init_f(void)
 {
 	SETUP_IOMUX_PADS(uart4_pads);

configs/imx6qdl_icore_mmc_defconfig

@@ -14,6 +14,8 @@ CONFIG_SYS_MAXARGS=32
 # CONFIG_CMD_IMLS is not set
 CONFIG_CMD_BOOTZ=y
 CONFIG_CMD_GPIO=y
+CONFIG_CMD_MII=y
+CONFIG_CMD_PING=y
 CONFIG_CMD_MEMTEST=y
 CONFIG_CMD_MMC=y
 CONFIG_CMD_CACHE=y
@@ -23,7 +25,9 @@ CONFIG_CMD_EXT4_WRITE=y
 CONFIG_CMD_FAT=y
 CONFIG_CMD_FS_GENERIC=y
 CONFIG_OF_LIBFDT=y
+CONFIG_FEC_MXC=y
 CONFIG_MXC_UART=y
+CONFIG_NETDEVICES=y
 CONFIG_IMX_THERMAL=y
 CONFIG_SPL_LIBDISK_SUPPORT=y
 CONFIG_SPL_LIBCOMMON_SUPPORT=y

include/configs/imx6qdl_icore.h

@@ -111,6 +111,18 @@
 # define CONFIG_SYS_FSL_ESDHC_ADDR	USDHC2_BASE_ADDR
 #endif
 
+/* Ethernet */
+#ifdef CONFIG_FEC_MXC
+# define IMX_FEC_BASE			ENET_BASE_ADDR
+# define CONFIG_FEC_MXC_PHYADDR		0
+# define CONFIG_FEC_XCV_TYPE		RMII
+# define CONFIG_ETHPRIME		"FEC"
+
+# define CONFIG_MII
+# define CONFIG_PHYLIB
+# define CONFIG_PHY_SMSC
+#endif
+
 /* SPL */
 #ifdef CONFIG_SPL
 # define CONFIG_SPL_MMC_SUPPORT