mx6slevk: Add Ethernet support

mx6slevk has a SMSC8720 connected in RMII mode.

Add support for it.

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

4 files changed, 48 insertions, 0 deletions

diff --git a/arch/arm/cpu/armv7/mx6/clock.c b/arch/arm/cpu/armv7/mx6/clock.c
index 7a29c9b692..010d93208e 100644
--- a/arch/arm/cpu/armv7/mx6/clock.c
+++ b/arch/arm/cpu/armv7/mx6/clock.c
@@ -282,6 +282,36 @@ static u32 get_mmdc_ch0_clk(void)
 	return freq / (podf + 1);
 
 }
+
+int enable_fec_anatop_clock(void)
+{
+	u32 reg = 0;
+	s32 timeout = 100000;
+
+	struct anatop_regs __iomem *anatop =
+		(struct anatop_regs __iomem *)ANATOP_BASE_ADDR;
+
+	reg = readl(&anatop->pll_enet);
+	if ((reg & BM_ANADIG_PLL_ENET_POWERDOWN) ||
+	    (!(reg & BM_ANADIG_PLL_ENET_LOCK))) {
+		reg &= ~BM_ANADIG_PLL_ENET_POWERDOWN;
+		writel(reg, &anatop->pll_enet);
+		while (timeout--) {
+			if (readl(&anatop->pll_enet) & BM_ANADIG_PLL_ENET_LOCK)
+				break;
+		}
+		if (timeout < 0)
+			return -ETIMEDOUT;
+	}
+
+	/* Enable FEC clock */
+	reg |= BM_ANADIG_PLL_ENET_ENABLE;
+	reg &= ~BM_ANADIG_PLL_ENET_BYPASS;
+	writel(reg, &anatop->pll_enet);
+
+	return 0;
+}
+
 #else
 static u32 get_mmdc_ch0_clk(void)
 {
diff --git a/arch/arm/include/asm/arch-mx6/clock.h b/arch/arm/include/asm/arch-mx6/clock.h
index c49368765b..93f29a780f 100644
--- a/arch/arm/include/asm/arch-mx6/clock.h
+++ b/arch/arm/include/asm/arch-mx6/clock.h
@@ -50,4 +50,5 @@ void enable_usboh3_clk(unsigned char enable);
 int enable_sata_clock(void);
 int enable_i2c_clk(unsigned char enable, unsigned i2c_num);
 void enable_ipu_clock(void);
+int enable_fec_anatop_clock(void);
 #endif /* __ASM_ARCH_CLOCK_H */
diff --git a/arch/arm/include/asm/arch-mx6/iomux.h b/arch/arm/include/asm/arch-mx6/iomux.h
index f4cfd4f921..ff13a1ea9f 100644
--- a/arch/arm/include/asm/arch-mx6/iomux.h
+++ b/arch/arm/include/asm/arch-mx6/iomux.h
@@ -27,6 +27,11 @@
 #define IOMUXC_GPR13_SATA_PHY_2_MASK	(0x1f<<2)
 #define IOMUXC_GPR13_SATA_PHY_1_MASK	(3<<0)
 
+#define IOMUX_GPR1_FEC_CLOCK_MUX1_SEL_MASK (0x3 << 17)
+#define IOMUX_GPR1_FEC_CLOCK_MUX2_SEL_MASK (0x1 << 14)
+#define IOMUX_GPR1_FEC_MASK    (IOMUX_GPR1_FEC_CLOCK_MUX1_SEL_MASK \
+				| IOMUX_GPR1_FEC_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)
diff --git a/arch/arm/include/asm/arch-mx6/mx6sl_pins.h b/arch/arm/include/asm/arch-mx6/mx6sl_pins.h
index b39a354f39..5f9c90ad87 100644
--- a/arch/arm/include/asm/arch-mx6/mx6sl_pins.h
+++ b/arch/arm/include/asm/arch-mx6/mx6sl_pins.h
@@ -18,5 +18,17 @@ enum {
 	MX6_PAD_SD2_DAT3__USDHC2_DAT3				= IOMUX_PAD(0x0570, 0x0268, 0, 0x0000, 0, 0),
 	MX6_PAD_UART1_RXD__UART1_RXD				= IOMUX_PAD(0x05A0, 0x0298, 0, 0x07FC, 0, 0),
 	MX6_PAD_UART1_TXD__UART1_TXD				= IOMUX_PAD(0x05A4, 0x029C, 0, 0x0000, 0, 0),
+
+	MX6_PAD_FEC_MDC__FEC_MDC				= IOMUX_PAD(0x41c, 0x12c, 0, 0x000, 0, 0),
+	MX6_PAD_FEC_MDIO__FEC_MDIO				= IOMUX_PAD(0x420, 0x130, 0, 0x6f4, 1, 0),
+	MX6_PAD_FEC_CRS_DV__FEC_RX_DV				= IOMUX_PAD(0x418, 0x128, 0, 0x704, 1, 0),
+	MX6_PAD_FEC_RXD0__FEC_RX_DATA0				= IOMUX_PAD(0x42c, 0x13c, 0, 0x6f8, 0, 0),
+	MX6_PAD_FEC_RXD1__FEC_RX_DATA1				= IOMUX_PAD(0x430, 0x140, 0, 0x6fc, 1, 0),
+	MX6_PAD_FEC_TX_EN__FEC_TX_EN				= IOMUX_PAD(0x438, 0x148, 0, 0x000, 0, 0),
+	MX6_PAD_FEC_TXD0__FEC_TX_DATA0				= IOMUX_PAD(0x43c, 0x14c, 0, 0x000, 0, 0),
+	MX6_PAD_FEC_TXD1__FEC_TX_DATA1				= IOMUX_PAD(0x440, 0x150, 0, 0x000, 0, 0),
+	MX6_PAD_FEC_REF_CLK__FEC_REF_OUT			= IOMUX_PAD(0x424, 0x134, 0x10, 0x000, 0, 0),
+	MX6_PAD_FEC_RX_ER__GPIO_4_19				= IOMUX_PAD(0x0428, 0x0138, 5, 0x0000, 0, 0),
+	MX6_PAD_FEC_TX_CLK__GPIO_4_21				= IOMUX_PAD(0x0434, 0x0144, 5, 0x0000, 0, 0),
 };
 #endif	/* __ASM_ARCH_MX6_MX6SL_PINS_H__ */