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.

Changes since v1: - Replace access via register + offset style with proper structure - Fix checkpatch error

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..cd2299d 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 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..0edd0e4 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 *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