[U-Boot] [PATCH 2/2] mx6slevk: Add Ethernet support

Fabio Estevam
2013-09-12T22:41:18Z

From: Fabio Estevam <fabio.estevam@freescale.com>

mx6slevk has a SMSC8720 connected in RMII mode.

Add support for it.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
---
Based on FSL BSP, which uses U-boot 2013.04.

arch/arm/cpu/armv7/mx6/clock.c | 30 +++++++++++++
arch/arm/include/asm/arch-mx6/clock.h | 1 +
arch/arm/include/asm/arch-mx6/iomux.h | 5 +++
arch/arm/include/asm/arch-mx6/mx6sl_pins.h | 12 ++++++
board/freescale/mx6slevk/mx6slevk.c | 68 ++++++++++++++++++++++++++++++
include/configs/mx6slevk.h | 14 ++++++
6 files changed, 130 insertions(+)

diff --git a/arch/arm/cpu/armv7/mx6/clock.c b/arch/arm/cpu/armv7/mx6/clock.c
index 7efb0d2..87d7167 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_BASE_ADDR + 0xe0);
+ 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 c493687..93f29a7 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 f4cfd4f..ff13a1e 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 b39a354..5f9c90a 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__ */
diff --git a/board/freescale/mx6slevk/mx6slevk.c b/board/freescale/mx6slevk/mx6slevk.c
index 5b6ef81..2d995b9 100644
--- a/board/freescale/mx6slevk/mx6slevk.c
+++ b/board/freescale/mx6slevk/mx6slevk.c
@@ -18,6 +18,7 @@
#include <common.h>
#include <fsl_esdhc.h>
#include <mmc.h>
+#include <netdev.h>

DECLARE_GLOBAL_DATA_PTR;

@@ -29,6 +30,12 @@ DECLARE_GLOBAL_DATA_PTR;
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)
+
+#define ETH_PHY_RESET IMX_GPIO_NR(4, 21)
+
int dram_init(void)
{
gd->ram_size = get_ram_size((void *)PHYS_SDRAM, PHYS_SDRAM_SIZE);
@@ -50,11 +57,35 @@ static iomux_v3_cfg_t const usdhc2_pads[] = {
MX6_PAD_SD2_DAT3__USDHC2_DAT3 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
};

+static iomux_v3_cfg_t const fec_pads[] = {
+ MX6_PAD_FEC_MDC__FEC_MDC | MUX_PAD_CTRL(ENET_PAD_CTRL),
+ MX6_PAD_FEC_MDIO__FEC_MDIO | MUX_PAD_CTRL(ENET_PAD_CTRL),
+ MX6_PAD_FEC_CRS_DV__FEC_RX_DV | MUX_PAD_CTRL(ENET_PAD_CTRL),
+ MX6_PAD_FEC_RXD0__FEC_RX_DATA0 | MUX_PAD_CTRL(ENET_PAD_CTRL),
+ MX6_PAD_FEC_RXD1__FEC_RX_DATA1 | MUX_PAD_CTRL(ENET_PAD_CTRL),
+ MX6_PAD_FEC_TX_EN__FEC_TX_EN | MUX_PAD_CTRL(ENET_PAD_CTRL),
+ MX6_PAD_FEC_TXD0__FEC_TX_DATA0 | MUX_PAD_CTRL(ENET_PAD_CTRL),
+ MX6_PAD_FEC_TXD1__FEC_TX_DATA1 | MUX_PAD_CTRL(ENET_PAD_CTRL),
+ MX6_PAD_FEC_REF_CLK__FEC_REF_OUT | MUX_PAD_CTRL(ENET_PAD_CTRL),
+ MX6_PAD_FEC_RX_ER__GPIO_4_19 | MUX_PAD_CTRL(NO_PAD_CTRL),
+ MX6_PAD_FEC_TX_CLK__GPIO_4_21 | 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 void setup_iomux_fec(void)
+{
+ imx_iomux_v3_setup_multiple_pads(fec_pads, ARRAY_SIZE(fec_pads));
+
+ /* Reset LAN8720 PHY */
+ gpio_direction_output(ETH_PHY_RESET , 0);
+ udelay(1000);
+ gpio_set_value(ETH_PHY_RESET, 1);
+}
+
static struct fsl_esdhc_cfg usdhc_cfg[1] = {
{USDHC2_BASE_ADDR},
};
@@ -72,6 +103,40 @@ int board_mmc_init(bd_t *bis)
return fsl_esdhc_initialize(bis, &usdhc_cfg[0]);
}

+#ifdef CONFIG_FEC_MXC
+int board_eth_init(bd_t *bis)
+{
+ int ret;
+
+ setup_iomux_fec();
+
+ ret = cpu_eth_init(bis);
+ if (ret) {
+ printf("FEC MXC: %s:failed\n", __func__);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int setup_fec(void)
+{
+ struct iomuxc_base_regs *const iomuxc_regs
+ = (struct iomuxc_base_regs *) IOMUXC_BASE_ADDR;
+ int ret;
+
+ /* clear gpr1[14], gpr1[18:17] to select anatop clock */
+ clrsetbits_le32(&iomuxc_regs->gpr[1], IOMUX_GPR1_FEC_MASK, 0);
+
+ ret = enable_fec_anatop_clock();
+ if (ret)
+ return ret;
+
+ return 0;
+}
+#endif
+
+
int board_early_init_f(void)
{
setup_iomux_uart();
@@ -83,6 +148,9 @@ int board_init(void)
/* address of boot parameters */
gd->bd->bi_boot_params = PHYS_SDRAM + 0x100;

+#ifdef CONFIG_FEC_MXC
+ setup_fec();
+#endif
return 0;
}

diff --git a/include/configs/mx6slevk.h b/include/configs/mx6slevk.h
index ca8f2f6..792f17c 100644
--- a/include/configs/mx6slevk.h
+++ b/include/configs/mx6slevk.h
@@ -44,6 +44,20 @@
#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 RMII
+#define CONFIG_ETHPRIME "FEC"
+#define CONFIG_FEC_MXC_PHYADDR 0
+
+#define CONFIG_PHYLIB
+#define CONFIG_PHY_SMSC
+
/* allow to overwrite serial and ethaddr */
#define CONFIG_ENV_OVERWRITE
#define CONFIG_CONS_INDEX 1
--
1.8.1.2