mx6sxsabresd: Add Ethernet support

mx6sxsabresd board has 2 FEC ports, each one connected to a AR8031.

Add support for one FEC port initially.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>

arch/arm/include/asm/arch-mx6/crm_regs.h

@@ -981,6 +981,7 @@ struct mxc_ccm_reg {
 #define BM_ANADIG_PLL_ENET_RSVD1 0x7FE00000
 #define BF_ANADIG_PLL_ENET_RSVD1(v)  \
 	(((v) << 21) & BM_ANADIG_PLL_ENET_RSVD1)
+#define BM_ANADIG_PLL_ENET_REF_25M_ENABLE 0x00200000
 #define BM_ANADIG_PLL_ENET_ENABLE_SATA 0x00100000
 #define BM_ANADIG_PLL_ENET_ENABLE_PCIE 0x00080000
 #define BM_ANADIG_PLL_ENET_PFD_OFFSET_EN 0x00040000

arch/arm/include/asm/arch-mx6/iomux.h

@@ -65,6 +65,16 @@
 #define IOMUX_GPR1_FEC_MASK    (IOMUX_GPR1_FEC_CLOCK_MUX1_SEL_MASK \
 				| IOMUX_GPR1_FEC_CLOCK_MUX2_SEL_MASK)
 
+#define IOMUX_GPR1_FEC1_CLOCK_MUX1_SEL_MASK (0x1 << 17)
+#define IOMUX_GPR1_FEC1_CLOCK_MUX2_SEL_MASK (0x1 << 13)
+#define IOMUX_GPR1_FEC1_MASK	(IOMUX_GPR1_FEC1_CLOCK_MUX1_SEL_MASK \
+				| IOMUX_GPR1_FEC1_CLOCK_MUX2_SEL_MASK)
+
+#define IOMUX_GPR1_FEC2_CLOCK_MUX1_SEL_MASK (0x1 << 18)
+#define IOMUX_GPR1_FEC2_CLOCK_MUX2_SEL_MASK (0x1 << 14)
+#define IOMUX_GPR1_FEC2_MASK	(IOMUX_GPR1_FEC2_CLOCK_MUX1_SEL_MASK \
+				| IOMUX_GPR1_FEC2_CLOCK_MUX2_SEL_MASK)
+
 #define IOMUXC_GPR13_SATA_PHY_8_RXEQ_0P5DB	(0<<24)
 #define IOMUXC_GPR13_SATA_PHY_8_RXEQ_1P0DB	(1<<24)
 #define IOMUXC_GPR13_SATA_PHY_8_RXEQ_1P5DB	(2<<24)

board/freescale/mx6sxsabresd/mx6sxsabresd.c

@@ -7,6 +7,7 @@
  */
 
 #include <asm/arch/clock.h>
+#include <asm/arch/crm_regs.h>
 #include <asm/arch/iomux.h>
 #include <asm/arch/imx-regs.h>
 #include <asm/arch/mx6-pins.h>
@@ -20,6 +21,8 @@
 #include <fsl_esdhc.h>
 #include <mmc.h>
 #include <i2c.h>
+#include <miiphy.h>
+#include <netdev.h>
 #include <power/pmic.h>
 #include <power/pfuze100_pmic.h>
 
@@ -38,6 +41,21 @@ DECLARE_GLOBAL_DATA_PTR;
 	PAD_CTL_DSE_40ohm | PAD_CTL_HYS |			\
 	PAD_CTL_ODE)
 
+#define ENET_PAD_CTRL  (PAD_CTL_PUS_100K_UP | PAD_CTL_PUE |     \
+	PAD_CTL_SPEED_HIGH   |                                   \
+	PAD_CTL_DSE_48ohm   | PAD_CTL_SRE_FAST)
+
+#define ENET_CLK_PAD_CTRL  (PAD_CTL_SPEED_MED | \
+	PAD_CTL_DSE_120ohm   | PAD_CTL_SRE_FAST)
+
+#define ENET_RX_PAD_CTRL  (PAD_CTL_PKE | PAD_CTL_PUE |          \
+	PAD_CTL_SPEED_HIGH   | PAD_CTL_SRE_FAST)
+
+#define I2C_PAD_CTRL    (PAD_CTL_PKE | PAD_CTL_PUE |            \
+	PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED |               \
+	PAD_CTL_DSE_40ohm | PAD_CTL_HYS |			\
+	PAD_CTL_ODE)
+
 int dram_init(void)
 {
 	gd->ram_size = PHYS_SDRAM_SIZE;
@@ -60,11 +78,83 @@ static iomux_v3_cfg_t const usdhc4_pads[] = {
 	MX6_PAD_SD4_DATA7__GPIO6_IO_21 | MUX_PAD_CTRL(NO_PAD_CTRL),
 };
 
+static iomux_v3_cfg_t const fec1_pads[] = {
+	MX6_PAD_ENET1_MDC__ENET1_MDC | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6_PAD_ENET1_MDIO__ENET1_MDIO | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6_PAD_RGMII1_RX_CTL__ENET1_RX_EN | MUX_PAD_CTRL(ENET_RX_PAD_CTRL),
+	MX6_PAD_RGMII1_RD0__ENET1_RX_DATA_0 | MUX_PAD_CTRL(ENET_RX_PAD_CTRL),
+	MX6_PAD_RGMII1_RD1__ENET1_RX_DATA_1 | MUX_PAD_CTRL(ENET_RX_PAD_CTRL),
+	MX6_PAD_RGMII1_RD2__ENET1_RX_DATA_2 | MUX_PAD_CTRL(ENET_RX_PAD_CTRL),
+	MX6_PAD_RGMII1_RD3__ENET1_RX_DATA_3 | MUX_PAD_CTRL(ENET_RX_PAD_CTRL),
+	MX6_PAD_RGMII1_RXC__ENET1_RX_CLK | MUX_PAD_CTRL(ENET_RX_PAD_CTRL),
+	MX6_PAD_RGMII1_TX_CTL__ENET1_TX_EN | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6_PAD_RGMII1_TD0__ENET1_TX_DATA_0 | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6_PAD_RGMII1_TD1__ENET1_TX_DATA_1 | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6_PAD_RGMII1_TD2__ENET1_TX_DATA_2 | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6_PAD_RGMII1_TD3__ENET1_TX_DATA_3 | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6_PAD_RGMII1_TXC__ENET1_RGMII_TXC | MUX_PAD_CTRL(ENET_PAD_CTRL),
+};
+
+static iomux_v3_cfg_t const peri_3v3_pads[] = {
+	MX6_PAD_QSPI1A_DATA0__GPIO4_IO_16 | MUX_PAD_CTRL(NO_PAD_CTRL),
+};
+
+static iomux_v3_cfg_t const phy_control_pads[] = {
+	/* 25MHz Ethernet PHY Clock */
+	MX6_PAD_ENET2_RX_CLK__ENET2_REF_CLK_25M | MUX_PAD_CTRL(ENET_CLK_PAD_CTRL),
+
+	/* ENET PHY Power */
+	MX6_PAD_ENET2_COL__GPIO2_IO_6 | MUX_PAD_CTRL(NO_PAD_CTRL),
+
+	/* AR8031 PHY Reset */
+	MX6_PAD_ENET2_CRS__GPIO2_IO_7 | MUX_PAD_CTRL(NO_PAD_CTRL),
+};
+
 static void setup_iomux_uart(void)
 {
 	imx_iomux_v3_setup_multiple_pads(uart1_pads, ARRAY_SIZE(uart1_pads));
 }
 
+static int setup_fec(void)
+{
+	struct iomuxc *iomuxc_regs = (struct iomuxc *)IOMUXC_BASE_ADDR;
+	struct anatop_regs *anatop = (struct anatop_regs *)ANATOP_BASE_ADDR;
+	int ret;
+	int reg;
+
+	/* Use 125MHz anatop loopback REF_CLK1 for ENET1 */
+	clrsetbits_le32(&iomuxc_regs->gpr[1], IOMUX_GPR1_FEC1_MASK, 0);
+
+	imx_iomux_v3_setup_multiple_pads(phy_control_pads,
+					 ARRAY_SIZE(phy_control_pads));
+
+	/* Enable the ENET power, active low */
+	gpio_direction_output(IMX_GPIO_NR(2, 6) , 0);
+
+	/* Reset AR8031 PHY */
+	gpio_direction_output(IMX_GPIO_NR(2, 7) , 0);
+	udelay(500);
+	gpio_set_value(IMX_GPIO_NR(2, 7), 1);
+
+	reg = readl(&anatop->pll_enet);
+	reg |= BM_ANADIG_PLL_ENET_REF_25M_ENABLE;
+	writel(reg, &anatop->pll_enet);
+
+	ret = enable_fec_anatop_clock(ENET_125MHz);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+int board_eth_init(bd_t *bis)
+{
+	imx_iomux_v3_setup_multiple_pads(fec1_pads, ARRAY_SIZE(fec1_pads));
+	setup_fec();
+
+	return cpu_eth_init(bis);
+}
+
 #define PC MUX_PAD_CTRL(I2C_PAD_CTRL)
 /* I2C1 for PMIC */
 struct i2c_pads_info i2c_pad_info1 = {
@@ -131,11 +221,37 @@ static int pfuze_init(void)
 	return 0;
 }
 
+int board_phy_config(struct phy_device *phydev)
+{
+	/*
+	 * Enable 1.8V(SEL_1P5_1P8_POS_REG) on
+	 * Phy control debug reg 0
+	 */
+	phy_write(phydev, MDIO_DEVAD_NONE, 0x1d, 0x1f);
+	phy_write(phydev, MDIO_DEVAD_NONE, 0x1e, 0x8);
+
+	/* rgmii tx clock delay enable */
+	phy_write(phydev, MDIO_DEVAD_NONE, 0x1d, 0x05);
+	phy_write(phydev, MDIO_DEVAD_NONE, 0x1e, 0x100);
+
+	if (phydev->drv->config)
+		phydev->drv->config(phydev);
+
+	return 0;
+}
+
 int board_early_init_f(void)
 {
 	setup_iomux_uart();
 	setup_i2c(1, CONFIG_SYS_I2C_SPEED, 0x7f, &i2c_pad_info1);
 
+	/* Enable PERI_3V3, which is used by SD2, ENET, LVDS, BT */
+	imx_iomux_v3_setup_multiple_pads(peri_3v3_pads,
+					 ARRAY_SIZE(peri_3v3_pads));
+
+	/* Active high for ncp692 */
+	gpio_direction_output(IMX_GPIO_NR(4, 16) , 1);
+
 	return 0;
 }
 

include/configs/mx6sxsabresd.h

@@ -181,6 +181,23 @@
 #define CONFIG_POWER_PFUZE100
 #define CONFIG_POWER_PFUZE100_I2C_ADDR	0x08
 
+/* Network */
+#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_MXC_PHYADDR          0x1
+
+#define CONFIG_FEC_XCV_TYPE             RGMII
+#define CONFIG_ETHPRIME                 "FEC"
+
+#define CONFIG_PHYLIB
+#define CONFIG_PHY_ATHEROS
+
 /* FLASH and environment organization */
 #define CONFIG_SYS_NO_FLASH