board/toradex/colibri_vf/colibri_vf.c

/*
 * Copyright 2015 Toradex, Inc.
 *
 * Based on vf610twr.c:
 * Copyright 2013 Freescale Semiconductor, Inc.
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <asm/io.h>
#include <asm/arch/imx-regs.h>
#include <asm/arch/iomux-vf610.h>
#include <asm/arch/ddrmc-vf610.h>
#include <asm/arch/crm_regs.h>
#include <asm/arch/clock.h>
#include <mmc.h>
#include <fdt_support.h>
#include <fsl_esdhc.h>
#include <jffs2/load_kernel.h>
#include <miiphy.h>
#include <mtd_node.h>
#include <netdev.h>
#include <i2c.h>
#include <g_dnl.h>
#include <asm/gpio.h>
#include <usb.h>
#include "../common/tdx-common.h"

DECLARE_GLOBAL_DATA_PTR;

#define UART_PAD_CTRL	(PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED | \
			PAD_CTL_DSE_25ohm | PAD_CTL_OBE_IBE_ENABLE)

#define ESDHC_PAD_CTRL	(PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_HIGH | \
			PAD_CTL_DSE_20ohm | PAD_CTL_OBE_IBE_ENABLE)

#define ENET_PAD_CTRL	(PAD_CTL_PUS_47K_UP | PAD_CTL_SPEED_HIGH | \
			PAD_CTL_DSE_50ohm | PAD_CTL_OBE_IBE_ENABLE)

#define USB_PEN_GPIO           83
#define USB_CDET_GPIO		102

static struct ddrmc_cr_setting colibri_vf_cr_settings[] = {
	/* levelling */
	{ DDRMC_CR97_WRLVL_EN, 97 },
	{ DDRMC_CR98_WRLVL_DL_0(0), 98 },
	{ DDRMC_CR99_WRLVL_DL_1(0), 99 },
	{ DDRMC_CR102_RDLVL_REG_EN | DDRMC_CR102_RDLVL_GT_REGEN, 102 },
	{ DDRMC_CR105_RDLVL_DL_0(0), 105 },
	{ DDRMC_CR106_RDLVL_GTDL_0(4), 106 },
	{ DDRMC_CR110_RDLVL_DL_1(0) | DDRMC_CR110_RDLVL_GTDL_1(4), 110 },
	/* AXI */
	{ DDRMC_CR117_AXI0_W_PRI(0) | DDRMC_CR117_AXI0_R_PRI(0), 117 },
	{ DDRMC_CR118_AXI1_W_PRI(1) | DDRMC_CR118_AXI1_R_PRI(1), 118 },
	{ DDRMC_CR120_AXI0_PRI1_RPRI(2) |
		   DDRMC_CR120_AXI0_PRI0_RPRI(2), 120 },
	{ DDRMC_CR121_AXI0_PRI3_RPRI(2) |
		   DDRMC_CR121_AXI0_PRI2_RPRI(2), 121 },
	{ DDRMC_CR122_AXI1_PRI1_RPRI(1) | DDRMC_CR122_AXI1_PRI0_RPRI(1) |
		   DDRMC_CR122_AXI0_PRIRLX(100), 122 },
	{ DDRMC_CR123_AXI1_P_ODR_EN | DDRMC_CR123_AXI1_PRI3_RPRI(1) |
		   DDRMC_CR123_AXI1_PRI2_RPRI(1), 123 },
	{ DDRMC_CR124_AXI1_PRIRLX(100), 124 },
	{ DDRMC_CR126_PHY_RDLAT(8), 126 },
	{ DDRMC_CR132_WRLAT_ADJ(5) |
		   DDRMC_CR132_RDLAT_ADJ(6), 132 },
	{ DDRMC_CR137_PHYCTL_DL(2), 137 },
	{ DDRMC_CR138_PHY_WRLV_MXDL(256) |
		   DDRMC_CR138_PHYDRAM_CK_EN(1), 138 },
	{ DDRMC_CR139_PHY_WRLV_RESPLAT(4) | DDRMC_CR139_PHY_WRLV_LOAD(7) |
		   DDRMC_CR139_PHY_WRLV_DLL(3) |
		   DDRMC_CR139_PHY_WRLV_EN(3), 139 },
	{ DDRMC_CR140_PHY_WRLV_WW(64), 140 },
	{ DDRMC_CR143_RDLV_GAT_MXDL(1536) |
		   DDRMC_CR143_RDLV_MXDL(128), 143 },
	{ DDRMC_CR144_PHY_RDLVL_RES(4) | DDRMC_CR144_PHY_RDLV_LOAD(7) |
		   DDRMC_CR144_PHY_RDLV_DLL(3) |
		   DDRMC_CR144_PHY_RDLV_EN(3), 144 },
	{ DDRMC_CR145_PHY_RDLV_RR(64), 145 },
	{ DDRMC_CR146_PHY_RDLVL_RESP(64), 146 },
	{ DDRMC_CR147_RDLV_RESP_MASK(983040), 147 },
	{ DDRMC_CR148_RDLV_GATE_RESP_MASK(983040), 148 },
	{ DDRMC_CR151_RDLV_GAT_DQ_ZERO_CNT(1) |
		   DDRMC_CR151_RDLVL_DQ_ZERO_CNT(1), 151 },

	{ DDRMC_CR154_PAD_ZQ_EARLY_CMP_EN_TIMER(13) |
		   DDRMC_CR154_PAD_ZQ_MODE(1) |
		   DDRMC_CR154_DDR_SEL_PAD_CONTR(3) |
		   DDRMC_CR154_PAD_ZQ_HW_FOR(1), 154 },
	{ DDRMC_CR155_PAD_ODT_BYTE1(1) | DDRMC_CR155_PAD_ODT_BYTE0(1), 155 },
	{ DDRMC_CR158_TWR(6), 158 },
	{ DDRMC_CR161_ODT_EN(1) | DDRMC_CR161_TODTH_RD(2) |
		   DDRMC_CR161_TODTH_WR(2), 161 },
	/* end marker */
	{ 0, -1 }
};

static const iomux_v3_cfg_t usb_pads[] = {
	VF610_PAD_PTD4__GPIO_83,
	VF610_PAD_PTC29__GPIO_102,
};

int dram_init(void)
{
	static const struct ddr3_jedec_timings timings = {
		.tinit             = 5,
		.trst_pwron        = 80000,
		.cke_inactive      = 200000,
		.wrlat             = 5,
		.caslat_lin        = 12,
		.trc               = 21,
		.trrd              = 4,
		.tccd              = 4,
		.tbst_int_interval = 0,
		.tfaw              = 20,
		.trp               = 6,
		.twtr              = 4,
		.tras_min          = 15,
		.tmrd              = 4,
		.trtp              = 4,
		.tras_max          = 28080,
		.tmod              = 12,
		.tckesr            = 4,
		.tcke              = 3,
		.trcd_int          = 6,
		.tras_lockout      = 0,
		.tdal              = 12,
		.bstlen            = 3,
		.tdll              = 512,
		.trp_ab            = 6,
		.tref              = 3120,
		.trfc              = 64,
		.tref_int          = 0,
		.tpdex             = 3,
		.txpdll            = 10,
		.txsnr             = 48,
		.txsr              = 468,
		.cksrx             = 5,
		.cksre             = 5,
		.freq_chg_en       = 0,
		.zqcl              = 256,
		.zqinit            = 512,
		.zqcs              = 64,
		.ref_per_zq        = 64,
		.zqcs_rotate       = 0,
		.aprebit           = 10,
		.cmd_age_cnt       = 64,
		.age_cnt           = 64,
		.q_fullness        = 7,
		.odt_rd_mapcs0     = 0,
		.odt_wr_mapcs0     = 1,
		.wlmrd             = 40,
		.wldqsen           = 25,
	};

	ddrmc_setup_iomux(NULL, 0);

	ddrmc_ctrl_init_ddr3(&timings, colibri_vf_cr_settings, NULL, 1, 2);
	gd->ram_size = get_ram_size((void *)PHYS_SDRAM, PHYS_SDRAM_SIZE);

	return 0;
}

static void setup_iomux_uart(void)
{
	static const iomux_v3_cfg_t uart_pads[] = {
		NEW_PAD_CTRL(VF610_PAD_PTB4__UART1_TX, UART_PAD_CTRL),
		NEW_PAD_CTRL(VF610_PAD_PTB5__UART1_RX, UART_PAD_CTRL),
		NEW_PAD_CTRL(VF610_PAD_PTB10__UART0_TX, UART_PAD_CTRL),
		NEW_PAD_CTRL(VF610_PAD_PTB11__UART0_RX, UART_PAD_CTRL),
	};

	imx_iomux_v3_setup_multiple_pads(uart_pads, ARRAY_SIZE(uart_pads));
}

static void setup_iomux_enet(void)
{
	static const iomux_v3_cfg_t enet0_pads[] = {
		NEW_PAD_CTRL(VF610_PAD_PTA6__RMII0_CLKOUT, ENET_PAD_CTRL),
		NEW_PAD_CTRL(VF610_PAD_PTC10__RMII1_MDIO, ENET_PAD_CTRL),
		NEW_PAD_CTRL(VF610_PAD_PTC9__RMII1_MDC, ENET_PAD_CTRL),
		NEW_PAD_CTRL(VF610_PAD_PTC11__RMII1_CRS_DV, ENET_PAD_CTRL),
		NEW_PAD_CTRL(VF610_PAD_PTC12__RMII1_RD1, ENET_PAD_CTRL),
		NEW_PAD_CTRL(VF610_PAD_PTC13__RMII1_RD0, ENET_PAD_CTRL),
		NEW_PAD_CTRL(VF610_PAD_PTC14__RMII1_RXER, ENET_PAD_CTRL),
		NEW_PAD_CTRL(VF610_PAD_PTC15__RMII1_TD1, ENET_PAD_CTRL),
		NEW_PAD_CTRL(VF610_PAD_PTC16__RMII1_TD0, ENET_PAD_CTRL),
		NEW_PAD_CTRL(VF610_PAD_PTC17__RMII1_TXEN, ENET_PAD_CTRL),
	};

	imx_iomux_v3_setup_multiple_pads(enet0_pads, ARRAY_SIZE(enet0_pads));
}

static void setup_iomux_i2c(void)
{
	static const iomux_v3_cfg_t i2c0_pads[] = {
		VF610_PAD_PTB14__I2C0_SCL,
		VF610_PAD_PTB15__I2C0_SDA,
	};

	imx_iomux_v3_setup_multiple_pads(i2c0_pads, ARRAY_SIZE(i2c0_pads));
}

#ifdef CONFIG_NAND_VF610_NFC
static void setup_iomux_nfc(void)
{
	static const iomux_v3_cfg_t nfc_pads[] = {
		VF610_PAD_PTD23__NF_IO7,
		VF610_PAD_PTD22__NF_IO6,
		VF610_PAD_PTD21__NF_IO5,
		VF610_PAD_PTD20__NF_IO4,
		VF610_PAD_PTD19__NF_IO3,
		VF610_PAD_PTD18__NF_IO2,
		VF610_PAD_PTD17__NF_IO1,
		VF610_PAD_PTD16__NF_IO0,
		VF610_PAD_PTB24__NF_WE_B,
		VF610_PAD_PTB25__NF_CE0_B,
		VF610_PAD_PTB27__NF_RE_B,
		VF610_PAD_PTC26__NF_RB_B,
		VF610_PAD_PTC27__NF_ALE,
		VF610_PAD_PTC28__NF_CLE
	};

	imx_iomux_v3_setup_multiple_pads(nfc_pads, ARRAY_SIZE(nfc_pads));
}
#endif

#ifdef CONFIG_FSL_DSPI
static void setup_iomux_dspi(void)
{
	static const iomux_v3_cfg_t dspi1_pads[] = {
		VF610_PAD_PTD5__DSPI1_CS0,
		VF610_PAD_PTD6__DSPI1_SIN,
		VF610_PAD_PTD7__DSPI1_SOUT,
		VF610_PAD_PTD8__DSPI1_SCK,
	};

	imx_iomux_v3_setup_multiple_pads(dspi1_pads, ARRAY_SIZE(dspi1_pads));
}
#endif

#ifdef CONFIG_VYBRID_GPIO
static void setup_iomux_gpio(void)
{
	static const iomux_v3_cfg_t gpio_pads[] = {
		VF610_PAD_PTA17__GPIO_7,
		VF610_PAD_PTA20__GPIO_10,
		VF610_PAD_PTA21__GPIO_11,
		VF610_PAD_PTA30__GPIO_20,
		VF610_PAD_PTA31__GPIO_21,
		VF610_PAD_PTB0__GPIO_22,
		VF610_PAD_PTB1__GPIO_23,
		VF610_PAD_PTB6__GPIO_28,
		VF610_PAD_PTB7__GPIO_29,
		VF610_PAD_PTB8__GPIO_30,
		VF610_PAD_PTB9__GPIO_31,
		VF610_PAD_PTB12__GPIO_34,
		VF610_PAD_PTB13__GPIO_35,
		VF610_PAD_PTB16__GPIO_38,
		VF610_PAD_PTB17__GPIO_39,
		VF610_PAD_PTB18__GPIO_40,
		VF610_PAD_PTB21__GPIO_43,
		VF610_PAD_PTB22__GPIO_44,
		VF610_PAD_PTC0__GPIO_45,
		VF610_PAD_PTC1__GPIO_46,
		VF610_PAD_PTC2__GPIO_47,
		VF610_PAD_PTC3__GPIO_48,
		VF610_PAD_PTC4__GPIO_49,
		VF610_PAD_PTC5__GPIO_50,
		VF610_PAD_PTC6__GPIO_51,
		VF610_PAD_PTC7__GPIO_52,
		VF610_PAD_PTC8__GPIO_53,
		VF610_PAD_PTD31__GPIO_63,
		VF610_PAD_PTD30__GPIO_64,
		VF610_PAD_PTD29__GPIO_65,
		VF610_PAD_PTD28__GPIO_66,
		VF610_PAD_PTD27__GPIO_67,
		VF610_PAD_PTD26__GPIO_68,
		VF610_PAD_PTD25__GPIO_69,
		VF610_PAD_PTD24__GPIO_70,
		VF610_PAD_PTD9__GPIO_88,
		VF610_PAD_PTD10__GPIO_89,
		VF610_PAD_PTD11__GPIO_90,
		VF610_PAD_PTD12__GPIO_91,
		VF610_PAD_PTD13__GPIO_92,
		VF610_PAD_PTB23__GPIO_93,
		VF610_PAD_PTB26__GPIO_96,
		VF610_PAD_PTB28__GPIO_98,
		VF610_PAD_PTC30__GPIO_103,
		VF610_PAD_PTA7__GPIO_134,
	};

	imx_iomux_v3_setup_multiple_pads(gpio_pads, ARRAY_SIZE(gpio_pads));
}
#endif

#ifdef CONFIG_FSL_ESDHC
struct fsl_esdhc_cfg esdhc_cfg[1] = {
	{ESDHC1_BASE_ADDR},
};

int board_mmc_getcd(struct mmc *mmc)
{
	/* eSDHC1 is always present */
	return 1;
}

int board_mmc_init(bd_t *bis)
{
	static const iomux_v3_cfg_t esdhc1_pads[] = {
		NEW_PAD_CTRL(VF610_PAD_PTA24__ESDHC1_CLK, ESDHC_PAD_CTRL),
		NEW_PAD_CTRL(VF610_PAD_PTA25__ESDHC1_CMD, ESDHC_PAD_CTRL),
		NEW_PAD_CTRL(VF610_PAD_PTA26__ESDHC1_DAT0, ESDHC_PAD_CTRL),
		NEW_PAD_CTRL(VF610_PAD_PTA27__ESDHC1_DAT1, ESDHC_PAD_CTRL),
		NEW_PAD_CTRL(VF610_PAD_PTA28__ESDHC1_DAT2, ESDHC_PAD_CTRL),
		NEW_PAD_CTRL(VF610_PAD_PTA29__ESDHC1_DAT3, ESDHC_PAD_CTRL),
	};

	esdhc_cfg[0].sdhc_clk = mxc_get_clock(MXC_ESDHC_CLK);

	imx_iomux_v3_setup_multiple_pads(
		esdhc1_pads, ARRAY_SIZE(esdhc1_pads));

	return fsl_esdhc_initialize(bis, &esdhc_cfg[0]);
}
#endif

static inline int is_colibri_vf61(void)
{
	struct mscm *mscm = (struct mscm *)MSCM_BASE_ADDR;

	/*
	 * Detect board type by Level 2 Cache: VF50 don't have any
	 * Level 2 Cache.
	 */
	return !!mscm->cpxcfg1;
}

static void clock_init(void)
{
	struct ccm_reg *ccm = (struct ccm_reg *)CCM_BASE_ADDR;
	struct anadig_reg *anadig = (struct anadig_reg *)ANADIG_BASE_ADDR;
	u32 pfd_clk_sel, ddr_clk_sel;

	clrsetbits_le32(&ccm->ccgr0, CCM_REG_CTRL_MASK,
			CCM_CCGR0_UART0_CTRL_MASK);
#ifdef CONFIG_FSL_DSPI
	setbits_le32(&ccm->ccgr0, CCM_CCGR0_DSPI1_CTRL_MASK);
#endif
	clrsetbits_le32(&ccm->ccgr1, CCM_REG_CTRL_MASK,
			CCM_CCGR1_PIT_CTRL_MASK | CCM_CCGR1_WDOGA5_CTRL_MASK);
	clrsetbits_le32(&ccm->ccgr2, CCM_REG_CTRL_MASK,
			CCM_CCGR2_IOMUXC_CTRL_MASK | CCM_CCGR2_PORTA_CTRL_MASK |
			CCM_CCGR2_PORTB_CTRL_MASK | CCM_CCGR2_PORTC_CTRL_MASK |
			CCM_CCGR2_PORTD_CTRL_MASK | CCM_CCGR2_PORTE_CTRL_MASK);
	clrsetbits_le32(&ccm->ccgr3, CCM_REG_CTRL_MASK,
			CCM_CCGR3_ANADIG_CTRL_MASK | CCM_CCGR3_SCSC_CTRL_MASK);
	clrsetbits_le32(&ccm->ccgr4, CCM_REG_CTRL_MASK,
			CCM_CCGR4_WKUP_CTRL_MASK | CCM_CCGR4_CCM_CTRL_MASK |
			CCM_CCGR4_GPC_CTRL_MASK | CCM_CCGR4_I2C0_CTRL_MASK);
	clrsetbits_le32(&ccm->ccgr6, CCM_REG_CTRL_MASK,
			CCM_CCGR6_OCOTP_CTRL_MASK | CCM_CCGR6_DDRMC_CTRL_MASK);
	clrsetbits_le32(&ccm->ccgr7, CCM_REG_CTRL_MASK,
			CCM_CCGR7_SDHC1_CTRL_MASK);
	clrsetbits_le32(&ccm->ccgr9, CCM_REG_CTRL_MASK,
			CCM_CCGR9_FEC0_CTRL_MASK | CCM_CCGR9_FEC1_CTRL_MASK);
	clrsetbits_le32(&ccm->ccgr10, CCM_REG_CTRL_MASK,
			CCM_CCGR10_NFC_CTRL_MASK);

#ifdef CONFIG_USB_EHCI_VF
	setbits_le32(&ccm->ccgr1, CCM_CCGR1_USBC0_CTRL_MASK);
	setbits_le32(&ccm->ccgr7, CCM_CCGR7_USBC1_CTRL_MASK);

	clrsetbits_le32(&anadig->pll3_ctrl, ANADIG_PLL3_CTRL_BYPASS |
			ANADIG_PLL3_CTRL_POWERDOWN |
			ANADIG_PLL3_CTRL_DIV_SELECT,
			ANADIG_PLL3_CTRL_ENABLE);
	clrsetbits_le32(&anadig->pll7_ctrl, ANADIG_PLL7_CTRL_BYPASS |
			ANADIG_PLL7_CTRL_POWERDOWN |
			ANADIG_PLL7_CTRL_DIV_SELECT,
			ANADIG_PLL7_CTRL_ENABLE);
#endif

	clrsetbits_le32(&anadig->pll5_ctrl, ANADIG_PLL5_CTRL_BYPASS |
			ANADIG_PLL5_CTRL_POWERDOWN, ANADIG_PLL5_CTRL_ENABLE |
			ANADIG_PLL5_CTRL_DIV_SELECT);

	if (is_colibri_vf61()) {
		clrsetbits_le32(&anadig->pll2_ctrl, ANADIG_PLL5_CTRL_BYPASS |
				ANADIG_PLL2_CTRL_POWERDOWN,
				ANADIG_PLL2_CTRL_ENABLE |
				ANADIG_PLL2_CTRL_DIV_SELECT);
	}

	clrsetbits_le32(&anadig->pll1_ctrl, ANADIG_PLL1_CTRL_POWERDOWN,
			ANADIG_PLL1_CTRL_ENABLE | ANADIG_PLL1_CTRL_DIV_SELECT);

	clrsetbits_le32(&ccm->ccr, CCM_CCR_OSCNT_MASK,
			CCM_CCR_FIRC_EN | CCM_CCR_OSCNT(5));

	/* See "Typical PLL Configuration" */
	if (is_colibri_vf61()) {
		pfd_clk_sel = CCM_CCSR_PLL1_PFD_CLK_SEL(1);
		ddr_clk_sel = CCM_CCSR_DDRC_CLK_SEL(0);
	} else {
		pfd_clk_sel = CCM_CCSR_PLL1_PFD_CLK_SEL(3);
		ddr_clk_sel = CCM_CCSR_DDRC_CLK_SEL(1);
	}

	clrsetbits_le32(&ccm->ccsr, CCM_REG_CTRL_MASK, pfd_clk_sel |
			CCM_CCSR_PLL2_PFD4_EN | CCM_CCSR_PLL2_PFD3_EN |
			CCM_CCSR_PLL2_PFD2_EN | CCM_CCSR_PLL2_PFD1_EN |
			CCM_CCSR_PLL1_PFD4_EN | CCM_CCSR_PLL1_PFD3_EN |
			CCM_CCSR_PLL1_PFD2_EN | CCM_CCSR_PLL1_PFD1_EN |
			ddr_clk_sel | CCM_CCSR_FAST_CLK_SEL(1) |
			CCM_CCSR_SYS_CLK_SEL(4));

	clrsetbits_le32(&ccm->cacrr, CCM_REG_CTRL_MASK,
			CCM_CACRR_IPG_CLK_DIV(1) | CCM_CACRR_BUS_CLK_DIV(2) |
			CCM_CACRR_ARM_CLK_DIV(0));
	clrsetbits_le32(&ccm->cscmr1, CCM_REG_CTRL_MASK,
			CCM_CSCMR1_ESDHC1_CLK_SEL(3) |
			CCM_CSCMR1_NFC_CLK_SEL(0));
	clrsetbits_le32(&ccm->cscdr1, CCM_REG_CTRL_MASK,
			CCM_CSCDR1_RMII_CLK_EN);
	clrsetbits_le32(&ccm->cscdr2, CCM_REG_CTRL_MASK,
			CCM_CSCDR2_ESDHC1_EN | CCM_CSCDR2_ESDHC1_CLK_DIV(0) |
			CCM_CSCDR2_NFC_EN);
	clrsetbits_le32(&ccm->cscdr3, CCM_REG_CTRL_MASK,
			CCM_CSCDR3_NFC_PRE_DIV(3));
	clrsetbits_le32(&ccm->cscmr2, CCM_REG_CTRL_MASK,
			CCM_CSCMR2_RMII_CLK_SEL(2));
}

static void mscm_init(void)
{
	struct mscm_ir *mscmir = (struct mscm_ir *)MSCM_IR_BASE_ADDR;
	int i;

	for (i = 0; i < MSCM_IRSPRC_NUM; i++)
		writew(MSCM_IRSPRC_CP0_EN, &mscmir->irsprc[i]);
}

int board_phy_config(struct phy_device *phydev)
{
	if (phydev->drv->config)
		phydev->drv->config(phydev);

	return 0;
}

int board_early_init_f(void)
{
	clock_init();
	mscm_init();

	setup_iomux_uart();
	setup_iomux_enet();
	setup_iomux_i2c();
#ifdef CONFIG_NAND_VF610_NFC
	setup_iomux_nfc();
#endif

#ifdef CONFIG_VYBRID_GPIO
	setup_iomux_gpio();
#endif

#ifdef CONFIG_FSL_DSPI
	setup_iomux_dspi();
#endif

	return 0;
}

#ifdef CONFIG_BOARD_LATE_INIT
int board_late_init(void)
{
	struct src *src = (struct src *)SRC_BASE_ADDR;

	/* Default memory arguments */
	if (!getenv("memargs")) {
		switch (gd->ram_size) {
		case 0x08000000:
			/* 128 MB */
			setenv("memargs", "mem=128M");
			break;
		case 0x10000000:
			/* 256 MB */
			setenv("memargs", "mem=256M");
			break;
		default:
			printf("Failed detecting RAM size.\n");
		}
	}

	if (((src->sbmr2 & SRC_SBMR2_BMOD_MASK) >> SRC_SBMR2_BMOD_SHIFT)
			== SRC_SBMR2_BMOD_SERIAL) {
		printf("Serial Downloader recovery mode, disable autoboot\n");
		setenv("bootdelay", "-1");
	}

	return 0;
}
#endif /* CONFIG_BOARD_LATE_INIT */

int board_init(void)
{
	struct scsc_reg *scsc = (struct scsc_reg *)SCSC_BASE_ADDR;

	/* address of boot parameters */
	gd->bd->bi_boot_params = PHYS_SDRAM + 0x100;

	/*
	 * Enable external 32K Oscillator
	 *
	 * The internal clock experiences significant drift
	 * so we must use the external oscillator in order
	 * to maintain correct time in the hwclock
	 */

	setbits_le32(&scsc->sosc_ctr, SCSC_SOSC_CTR_SOSC_EN);

#ifdef CONFIG_USB_EHCI_VF
	gpio_request(USB_CDET_GPIO, "usb-cdet-gpio");
#endif

	return 0;
}

int checkboard(void)
{
	if (is_colibri_vf61())
		puts("Board: Colibri VF61\n");
	else
		puts("Board: Colibri VF50\n");

	return 0;
}

#if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP)
int ft_board_setup(void *blob, bd_t *bd)
{
#ifdef CONFIG_FDT_FIXUP_PARTITIONS
	static struct node_info nodes[] = {
		{ "fsl,vf610-nfc", MTD_DEV_TYPE_NAND, }, /* NAND flash */
	};

	/* Update partition nodes using info from mtdparts env var */
	puts("   Updating MTD partitions...\n");
	fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
#endif

	return ft_common_board_setup(blob, bd);
}
#endif

#ifdef CONFIG_USB_EHCI_VF
int board_ehci_hcd_init(int port)
{
	imx_iomux_v3_setup_multiple_pads(usb_pads, ARRAY_SIZE(usb_pads));

	switch (port) {
	case 0:
		/* USBC does not have PEN, also configured as USB client only */
		break;
	case 1:
		gpio_request(USB_PEN_GPIO, "usb-pen-gpio");
		gpio_direction_output(USB_PEN_GPIO, 0);
		break;
	}
	return 0;
}

int board_usb_phy_mode(int port)
{
	switch (port) {
	case 0:
		/*
		 * Port 0 is used only in client mode on Colibri Vybrid modules
		 * Check for state of USB client gpio pin and accordingly return
		 * USB_INIT_DEVICE or USB_INIT_HOST.
		 */
		if (gpio_get_value(USB_CDET_GPIO))
			return USB_INIT_DEVICE;
		else
			return USB_INIT_HOST;
	case 1:
		/* Port 1 is used only in host mode on Colibri Vybrid modules */
		return USB_INIT_HOST;
	default:
		/*
		 * There are only two USB controllers on Vybrid. Ideally we will
		 * not reach here. However return USB_INIT_HOST if we do.
		 */
		return USB_INIT_HOST;
	}
}
#endif