board/Marvell/mvebu_armada-37xx/board.c - platform/external/u-boot - Gitiles

 // SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2016 Stefan Roese <sr@denx.de>
  */

 #include <common.h>
 #include <dm.h>
 #include <dm/device-internal.h>
 #include <env.h>
 #include <i2c.h>
 #include <init.h>
 #include <mmc.h>
 #include <phy.h>
 #include <asm/global_data.h>
 #include <asm/io.h>
 #include <asm/arch/cpu.h>
 #include <asm/arch/soc.h>
 #include <linux/delay.h>

 DECLARE_GLOBAL_DATA_PTR;

 /* IO expander I2C device */
 #define I2C_IO_EXP_ADDR		0x22
 #define I2C_IO_CFG_REG_0	0x6
 #define I2C_IO_DATA_OUT_REG_0	0x2
 #define I2C_IO_REG_0_SATA_OFF	2
 #define I2C_IO_REG_0_USB_H_OFF	1

 /* The pin control values are the same for DB and Espressobin */
 #define PINCTRL_NB_REG_VALUE	0x000173fa
 #define PINCTRL_SB_REG_VALUE	0x00007a23

 /* Ethernet switch registers */
 /* SMI addresses for multi-chip mode */
 #define MVEBU_PORT_CTRL_SMI_ADDR(p)	(16 + (p))
 #define MVEBU_SW_G2_SMI_ADDR		(28)

 /* Multi-chip mode */
 #define MVEBU_SW_SMI_DATA_REG		(1)
 #define MVEBU_SW_SMI_CMD_REG		(0)
  #define SW_SMI_CMD_REG_ADDR_OFF	0
  #define SW_SMI_CMD_DEV_ADDR_OFF	5
  #define SW_SMI_CMD_SMI_OP_OFF		10
  #define SW_SMI_CMD_SMI_MODE_OFF	12
  #define SW_SMI_CMD_SMI_BUSY_OFF	15

 /* Single-chip mode */
 /* Switch Port Registers */
 #define MVEBU_SW_LINK_CTRL_REG		(1)
 #define MVEBU_SW_PORT_CTRL_REG		(4)
 #define MVEBU_SW_PORT_BASE_VLAN		(6)

 /* Global 2 Registers */
 #define MVEBU_G2_SMI_PHY_CMD_REG	(24)
 #define MVEBU_G2_SMI_PHY_DATA_REG	(25)

 /*
  * Memory Controller Registers
  *
  * Assembled based on public information:
  * https://gitlab.nic.cz/turris/mox-boot-builder/-/blob/master/wtmi/main.c#L332-336
  * https://github.com/MarvellEmbeddedProcessors/mv-ddr-marvell/blob/mv_ddr-armada-18.12/drivers/mv_ddr_mc6.h#L309-L332
  *
  * And checked against the written register values for the various topologies:
  * https://github.com/MarvellEmbeddedProcessors/mv-ddr-marvell/blob/mv_ddr-armada-atf-mainline/a3700/mv_ddr_tim.h
  */
 #define A3700_CH0_MC_CTRL2_REG		MVEBU_REGISTER(0x002c4)
 #define A3700_MC_CTRL2_SDRAM_TYPE_MASK	0xf
 #define A3700_MC_CTRL2_SDRAM_TYPE_OFFS	4
 #define A3700_MC_CTRL2_SDRAM_TYPE_DDR3	2
 #define A3700_MC_CTRL2_SDRAM_TYPE_DDR4	3

 int board_early_init_f(void)
 {
 	return 0;
 }

 int board_init(void)
 {
 	/* adress of boot parameters */
 	gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;

 	return 0;
 }

 #ifdef CONFIG_BOARD_LATE_INIT
 int board_late_init(void)
 {
 	struct udevice *dev;
 	struct mmc *mmc_dev;
 	bool ddr4, emmc;

 	if (!of_machine_is_compatible("globalscale,espressobin"))
 		return 0;

 	/* If the memory controller has been configured for DDR4, we're running on v7 */
 	ddr4 = ((readl(A3700_CH0_MC_CTRL2_REG) >> A3700_MC_CTRL2_SDRAM_TYPE_OFFS)
 		& A3700_MC_CTRL2_SDRAM_TYPE_MASK) == A3700_MC_CTRL2_SDRAM_TYPE_DDR4;

 	/* eMMC is mmc dev num 1 */
 	mmc_dev = find_mmc_device(1);
 	emmc = (mmc_dev && mmc_init(mmc_dev) == 0);

 	/* if eMMC is not present then remove it from DM */
 	if (!emmc && mmc_dev) {
 		dev = mmc_dev->dev;
 		device_remove(dev, DM_REMOVE_NORMAL);
 		device_unbind(dev);
 	}

 	if (env_get("fdtfile"))
 		return 0;

 	if (ddr4 && emmc)
 		env_set("fdtfile", "marvell/armada-3720-espressobin-v7-emmc.dtb");
 	else if (ddr4)
 		env_set("fdtfile", "marvell/armada-3720-espressobin-v7.dtb");
 	else if (emmc)
 		env_set("fdtfile", "marvell/armada-3720-espressobin-emmc.dtb");
 	else
 		env_set("fdtfile", "marvell/armada-3720-espressobin.dtb");

 	return 0;
 }
 #endif

 /* Board specific AHCI / SATA enable code */
 int board_ahci_enable(void)
 {
 	struct udevice *dev;
 	int ret;
 	u8 buf[8];

 	/* Only DB requres this configuration */
 	if (!of_machine_is_compatible("marvell,armada-3720-db"))
 		return 0;

 	/* Configure IO exander PCA9555: 7bit address 0x22 */
 	ret = i2c_get_chip_for_busnum(0, I2C_IO_EXP_ADDR, 1, &dev);
 	if (ret) {
 		printf("Cannot find PCA9555: %d\n", ret);
 		return 0;
 	}

 	ret = dm_i2c_read(dev, I2C_IO_CFG_REG_0, buf, 1);
 	if (ret) {
 		printf("Failed to read IO expander value via I2C\n");
 		return -EIO;
 	}

 	/*
 	 * Enable SATA power via IO expander connected via I2C by setting
 	 * the corresponding bit to output mode to enable power for SATA
 	 */
 	buf[0] &= ~(1 << I2C_IO_REG_0_SATA_OFF);
 	ret = dm_i2c_write(dev, I2C_IO_CFG_REG_0, buf, 1);
 	if (ret) {
 		printf("Failed to set IO expander via I2C\n");
 		return -EIO;
 	}

 	return 0;
 }

 /* Board specific xHCI enable code */
 int board_xhci_enable(fdt_addr_t base)
 {
 	struct udevice *dev;
 	int ret;
 	u8 buf[8];

 	/* Only DB requres this configuration */
 	if (!of_machine_is_compatible("marvell,armada-3720-db"))
 		return 0;

 	/* Configure IO exander PCA9555: 7bit address 0x22 */
 	ret = i2c_get_chip_for_busnum(0, I2C_IO_EXP_ADDR, 1, &dev);
 	if (ret) {
 		printf("Cannot find PCA9555: %d\n", ret);
 		return 0;
 	}

 	printf("Enable USB VBUS\n");

 	/*
 	 * Read configuration (direction) and set VBUS pin as output
 	 * (reset pin = output)
 	 */
 	ret = dm_i2c_read(dev, I2C_IO_CFG_REG_0, buf, 1);
 	if (ret) {
 		printf("Failed to read IO expander value via I2C\n");
 		return -EIO;
 	}
 	buf[0] &= ~(1 << I2C_IO_REG_0_USB_H_OFF);
 	ret = dm_i2c_write(dev, I2C_IO_CFG_REG_0, buf, 1);
 	if (ret) {
 		printf("Failed to set IO expander via I2C\n");
 		return -EIO;
 	}

 	/* Read VBUS output value and disable it */
 	ret = dm_i2c_read(dev, I2C_IO_DATA_OUT_REG_0, buf, 1);
 	if (ret) {
 		printf("Failed to read IO expander value via I2C\n");
 		return -EIO;
 	}
 	buf[0] &= ~(1 << I2C_IO_REG_0_USB_H_OFF);
 	ret = dm_i2c_write(dev, I2C_IO_DATA_OUT_REG_0, buf, 1);
 	if (ret) {
 		printf("Failed to set IO expander via I2C\n");
 		return -EIO;
 	}

 	/*
 	 * Required delay for configuration to settle - must wait for
 	 * power on port is disabled in case VBUS signal was high,
 	 * required 3 seconds delay to let VBUS signal fully settle down
 	 */
 	mdelay(3000);

 	/* Enable VBUS power: Set output value of VBUS pin as enabled */
 	buf[0] |= (1 << I2C_IO_REG_0_USB_H_OFF);
 	ret = dm_i2c_write(dev, I2C_IO_DATA_OUT_REG_0, buf, 1);
 	if (ret) {
 		printf("Failed to set IO expander via I2C\n");
 		return -EIO;
 	}

 	mdelay(500); /* required delay to let output value settle */

 	return 0;
 }

 /* Helper function for accessing switch devices in multi-chip connection mode */
 static int mii_multi_chip_mode_write(struct mii_dev *bus, int dev_smi_addr,
 				     int smi_addr, int reg, u16 value)
 {
 	u16 smi_cmd = 0;

 	if (bus->write(bus, dev_smi_addr, 0,
 		       MVEBU_SW_SMI_DATA_REG, value) != 0) {
 		printf("Error writing to the PHY addr=%02x reg=%02x\n",
 		       smi_addr, reg);
 		return -EFAULT;
 	}

 	smi_cmd = (1 << SW_SMI_CMD_SMI_BUSY_OFF) |
 		  (1 << SW_SMI_CMD_SMI_MODE_OFF) |
 		  (1 << SW_SMI_CMD_SMI_OP_OFF) |
 		  (smi_addr << SW_SMI_CMD_DEV_ADDR_OFF) |
 		  (reg << SW_SMI_CMD_REG_ADDR_OFF);
 	if (bus->write(bus, dev_smi_addr, 0,
 		       MVEBU_SW_SMI_CMD_REG, smi_cmd) != 0) {
 		printf("Error writing to the PHY addr=%02x reg=%02x\n",
 		       smi_addr, reg);
 		return -EFAULT;
 	}

 	return 0;
 }

 /* Bring-up board-specific network stuff */
 int board_network_enable(struct mii_dev *bus)
 {
 	if (!of_machine_is_compatible("globalscale,espressobin"))
 		return 0;

 	/*
 	 * FIXME: remove this code once Topaz driver gets available
 	 * A3720 Community Board Only
 	 * Configure Topaz switch (88E6341)
 	 * Restrict output to ports 1,2,3 only from port 0 (CPU)
 	 * Set port 0,1,2,3 to forwarding Mode (through Switch Port registers)
 	 */
 	mii_multi_chip_mode_write(bus, 1, MVEBU_PORT_CTRL_SMI_ADDR(1),
 				  MVEBU_SW_PORT_BASE_VLAN, BIT(0));
 	mii_multi_chip_mode_write(bus, 1, MVEBU_PORT_CTRL_SMI_ADDR(2),
 				  MVEBU_SW_PORT_BASE_VLAN, BIT(0));
 	mii_multi_chip_mode_write(bus, 1, MVEBU_PORT_CTRL_SMI_ADDR(3),
 				  MVEBU_SW_PORT_BASE_VLAN, BIT(0));

 	mii_multi_chip_mode_write(bus, 1, MVEBU_PORT_CTRL_SMI_ADDR(0),
 				  MVEBU_SW_PORT_CTRL_REG, 0x7f);
 	mii_multi_chip_mode_write(bus, 1, MVEBU_PORT_CTRL_SMI_ADDR(1),
 				  MVEBU_SW_PORT_CTRL_REG, 0x7f);
 	mii_multi_chip_mode_write(bus, 1, MVEBU_PORT_CTRL_SMI_ADDR(2),
 				  MVEBU_SW_PORT_CTRL_REG, 0x7f);
 	mii_multi_chip_mode_write(bus, 1, MVEBU_PORT_CTRL_SMI_ADDR(3),
 				  MVEBU_SW_PORT_CTRL_REG, 0x7f);

 	/* RGMII Delay on Port 0 (CPU port), force link to 1000Mbps */
 	mii_multi_chip_mode_write(bus, 1, MVEBU_PORT_CTRL_SMI_ADDR(0),
 				  MVEBU_SW_LINK_CTRL_REG, 0xe002);

 	/* Power up PHY 1, 2, 3 (through Global 2 registers) */
 	mii_multi_chip_mode_write(bus, 1, MVEBU_SW_G2_SMI_ADDR,
 				  MVEBU_G2_SMI_PHY_DATA_REG, 0x1140);
 	mii_multi_chip_mode_write(bus, 1, MVEBU_SW_G2_SMI_ADDR,
 				  MVEBU_G2_SMI_PHY_CMD_REG, 0x9620);
 	mii_multi_chip_mode_write(bus, 1, MVEBU_SW_G2_SMI_ADDR,
 				  MVEBU_G2_SMI_PHY_CMD_REG, 0x9640);
 	mii_multi_chip_mode_write(bus, 1, MVEBU_SW_G2_SMI_ADDR,
 				  MVEBU_G2_SMI_PHY_CMD_REG, 0x9660);

 	return 0;
 }

 #if defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_ENV_IS_IN_SPI_FLASH)
 int ft_board_setup(void *blob, struct bd_info *bd)
 {
 	int ret;
 	int spi_off;
 	int parts_off;
 	int part_off;

 	/* Fill SPI MTD partitions for Linux kernel on Espressobin */
 	if (!of_machine_is_compatible("globalscale,espressobin"))
 		return 0;

 	spi_off = fdt_node_offset_by_compatible(blob, -1, "jedec,spi-nor");
 	if (spi_off < 0)
 		return 0;

 	/* Do not touch partitions if they are already defined */
 	if (fdt_subnode_offset(blob, spi_off, "partitions") >= 0)
 		return 0;

 	parts_off = fdt_add_subnode(blob, spi_off, "partitions");
 	if (parts_off < 0) {
 		printf("Can't add partitions node: %s\n", fdt_strerror(parts_off));
 		return 0;
 	}

 	ret = fdt_setprop_string(blob, parts_off, "compatible", "fixed-partitions");
 	if (ret < 0) {
 		printf("Can't set compatible property: %s\n", fdt_strerror(ret));
 		return 0;
 	}

 	ret = fdt_setprop_u32(blob, parts_off, "#address-cells", 1);
 	if (ret < 0) {
 		printf("Can't set #address-cells property: %s\n", fdt_strerror(ret));
 		return 0;
 	}

 	ret = fdt_setprop_u32(blob, parts_off, "#size-cells", 1);
 	if (ret < 0) {
 		printf("Can't set #size-cells property: %s\n", fdt_strerror(ret));
 		return 0;
 	}

 	/* Add u-boot-env partition */

 	part_off = fdt_add_subnode(blob, parts_off, "partition@u-boot-env");
 	if (part_off < 0) {
 		printf("Can't add partition@u-boot-env node: %s\n", fdt_strerror(part_off));
 		return 0;
 	}

 	ret = fdt_setprop_u32(blob, part_off, "reg", CONFIG_ENV_OFFSET);
 	if (ret < 0) {
 		printf("Can't set partition@u-boot-env reg property: %s\n", fdt_strerror(ret));
 		return 0;
 	}

 	ret = fdt_appendprop_u32(blob, part_off, "reg", CONFIG_ENV_SIZE);
 	if (ret < 0) {
 		printf("Can't set partition@u-boot-env reg property: %s\n", fdt_strerror(ret));
 		return 0;
 	}

 	ret = fdt_setprop_string(blob, part_off, "label", "u-boot-env");
 	if (ret < 0) {
 		printf("Can't set partition@u-boot-env label property: %s\n", fdt_strerror(ret));
 		return 0;
 	}

 	/* Add firmware partition */

 	part_off = fdt_add_subnode(blob, parts_off, "partition@firmware");
 	if (part_off < 0) {
 		printf("Can't add partition@firmware node: %s\n", fdt_strerror(part_off));
 		return 0;
 	}

 	ret = fdt_setprop_u32(blob, part_off, "reg", 0);
 	if (ret < 0) {
 		printf("Can't set partition@firmware reg property: %s\n", fdt_strerror(ret));
 		return 0;
 	}

 	ret = fdt_appendprop_u32(blob, part_off, "reg", CONFIG_ENV_OFFSET);
 	if (ret < 0) {
 		printf("Can't set partition@firmware reg property: %s\n", fdt_strerror(ret));
 		return 0;
 	}

 	ret = fdt_setprop_string(blob, part_off, "label", "firmware");
 	if (ret < 0) {
 		printf("Can't set partition@firmware label property: %s\n", fdt_strerror(ret));
 		return 0;
 	}

 	return 0;
 }
 #endif
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* Copyright (C) 2016 Stefan Roese <sr@denx.de>
	*/

	#include <common.h>
	#include <dm.h>
	#include <dm/device-internal.h>
	#include <env.h>
	#include <i2c.h>
	#include <init.h>
	#include <mmc.h>
	#include <phy.h>
	#include <asm/global_data.h>
	#include <asm/io.h>
	#include <asm/arch/cpu.h>
	#include <asm/arch/soc.h>
	#include <linux/delay.h>

	DECLARE_GLOBAL_DATA_PTR;

	/* IO expander I2C device */
	#define I2C_IO_EXP_ADDR 0x22
	#define I2C_IO_CFG_REG_0 0x6
	#define I2C_IO_DATA_OUT_REG_0 0x2
	#define I2C_IO_REG_0_SATA_OFF 2
	#define I2C_IO_REG_0_USB_H_OFF 1

	/* The pin control values are the same for DB and Espressobin */
	#define PINCTRL_NB_REG_VALUE 0x000173fa
	#define PINCTRL_SB_REG_VALUE 0x00007a23

	/* Ethernet switch registers */
	/* SMI addresses for multi-chip mode */
	#define MVEBU_PORT_CTRL_SMI_ADDR(p) (16 + (p))
	#define MVEBU_SW_G2_SMI_ADDR (28)

	/* Multi-chip mode */
	#define MVEBU_SW_SMI_DATA_REG (1)
	#define MVEBU_SW_SMI_CMD_REG (0)
	#define SW_SMI_CMD_REG_ADDR_OFF 0
	#define SW_SMI_CMD_DEV_ADDR_OFF 5
	#define SW_SMI_CMD_SMI_OP_OFF 10
	#define SW_SMI_CMD_SMI_MODE_OFF 12
	#define SW_SMI_CMD_SMI_BUSY_OFF 15

	/* Single-chip mode */
	/* Switch Port Registers */
	#define MVEBU_SW_LINK_CTRL_REG (1)
	#define MVEBU_SW_PORT_CTRL_REG (4)
	#define MVEBU_SW_PORT_BASE_VLAN (6)

	/* Global 2 Registers */
	#define MVEBU_G2_SMI_PHY_CMD_REG (24)
	#define MVEBU_G2_SMI_PHY_DATA_REG (25)

	/*
	* Memory Controller Registers
	*
	* Assembled based on public information:
	* https://gitlab.nic.cz/turris/mox-boot-builder/-/blob/master/wtmi/main.c#L332-336
	* https://github.com/MarvellEmbeddedProcessors/mv-ddr-marvell/blob/mv_ddr-armada-18.12/drivers/mv_ddr_mc6.h#L309-L332
	*
	* And checked against the written register values for the various topologies:
	* https://github.com/MarvellEmbeddedProcessors/mv-ddr-marvell/blob/mv_ddr-armada-atf-mainline/a3700/mv_ddr_tim.h
	*/
	#define A3700_CH0_MC_CTRL2_REG MVEBU_REGISTER(0x002c4)
	#define A3700_MC_CTRL2_SDRAM_TYPE_MASK 0xf
	#define A3700_MC_CTRL2_SDRAM_TYPE_OFFS 4
	#define A3700_MC_CTRL2_SDRAM_TYPE_DDR3 2
	#define A3700_MC_CTRL2_SDRAM_TYPE_DDR4 3

	int board_early_init_f(void)
	{
	return 0;
	}

	int board_init(void)
	{
	/* adress of boot parameters */
	gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;

	return 0;
	}

	#ifdef CONFIG_BOARD_LATE_INIT
	int board_late_init(void)
	{
	struct udevice *dev;
	struct mmc *mmc_dev;
	bool ddr4, emmc;

	if (!of_machine_is_compatible("globalscale,espressobin"))
	return 0;

	/* If the memory controller has been configured for DDR4, we're running on v7 */
	ddr4 = ((readl(A3700_CH0_MC_CTRL2_REG) >> A3700_MC_CTRL2_SDRAM_TYPE_OFFS)
	& A3700_MC_CTRL2_SDRAM_TYPE_MASK) == A3700_MC_CTRL2_SDRAM_TYPE_DDR4;

	/* eMMC is mmc dev num 1 */
	mmc_dev = find_mmc_device(1);
	emmc = (mmc_dev && mmc_init(mmc_dev) == 0);

	/* if eMMC is not present then remove it from DM */
	if (!emmc && mmc_dev) {
	dev = mmc_dev->dev;
	device_remove(dev, DM_REMOVE_NORMAL);
	device_unbind(dev);
	}

	if (env_get("fdtfile"))
	return 0;

	if (ddr4 && emmc)
	env_set("fdtfile", "marvell/armada-3720-espressobin-v7-emmc.dtb");
	else if (ddr4)
	env_set("fdtfile", "marvell/armada-3720-espressobin-v7.dtb");
	else if (emmc)
	env_set("fdtfile", "marvell/armada-3720-espressobin-emmc.dtb");
	else
	env_set("fdtfile", "marvell/armada-3720-espressobin.dtb");

	return 0;
	}
	#endif

	/* Board specific AHCI / SATA enable code */
	int board_ahci_enable(void)
	{
	struct udevice *dev;
	int ret;
	u8 buf[8];

	/* Only DB requres this configuration */
	if (!of_machine_is_compatible("marvell,armada-3720-db"))
	return 0;

	/* Configure IO exander PCA9555: 7bit address 0x22 */
	ret = i2c_get_chip_for_busnum(0, I2C_IO_EXP_ADDR, 1, &dev);
	if (ret) {
	printf("Cannot find PCA9555: %d\n", ret);
	return 0;
	}

	ret = dm_i2c_read(dev, I2C_IO_CFG_REG_0, buf, 1);
	if (ret) {
	printf("Failed to read IO expander value via I2C\n");
	return -EIO;
	}

	/*
	* Enable SATA power via IO expander connected via I2C by setting
	* the corresponding bit to output mode to enable power for SATA
	*/
	buf[0] &= ~(1 << I2C_IO_REG_0_SATA_OFF);
	ret = dm_i2c_write(dev, I2C_IO_CFG_REG_0, buf, 1);
	if (ret) {
	printf("Failed to set IO expander via I2C\n");
	return -EIO;
	}

	return 0;
	}

	/* Board specific xHCI enable code */
	int board_xhci_enable(fdt_addr_t base)
	{
	struct udevice *dev;
	int ret;
	u8 buf[8];

	/* Only DB requres this configuration */
	if (!of_machine_is_compatible("marvell,armada-3720-db"))
	return 0;

	/* Configure IO exander PCA9555: 7bit address 0x22 */
	ret = i2c_get_chip_for_busnum(0, I2C_IO_EXP_ADDR, 1, &dev);
	if (ret) {
	printf("Cannot find PCA9555: %d\n", ret);
	return 0;
	}

	printf("Enable USB VBUS\n");

	/*
	* Read configuration (direction) and set VBUS pin as output
	* (reset pin = output)
	*/
	ret = dm_i2c_read(dev, I2C_IO_CFG_REG_0, buf, 1);
	if (ret) {
	printf("Failed to read IO expander value via I2C\n");
	return -EIO;
	}
	buf[0] &= ~(1 << I2C_IO_REG_0_USB_H_OFF);
	ret = dm_i2c_write(dev, I2C_IO_CFG_REG_0, buf, 1);
	if (ret) {
	printf("Failed to set IO expander via I2C\n");
	return -EIO;
	}

	/* Read VBUS output value and disable it */
	ret = dm_i2c_read(dev, I2C_IO_DATA_OUT_REG_0, buf, 1);
	if (ret) {
	printf("Failed to read IO expander value via I2C\n");
	return -EIO;
	}
	buf[0] &= ~(1 << I2C_IO_REG_0_USB_H_OFF);
	ret = dm_i2c_write(dev, I2C_IO_DATA_OUT_REG_0, buf, 1);
	if (ret) {
	printf("Failed to set IO expander via I2C\n");
	return -EIO;
	}

	/*
	* Required delay for configuration to settle - must wait for
	* power on port is disabled in case VBUS signal was high,
	* required 3 seconds delay to let VBUS signal fully settle down
	*/
	mdelay(3000);

	/* Enable VBUS power: Set output value of VBUS pin as enabled */
	buf[0] \|= (1 << I2C_IO_REG_0_USB_H_OFF);
	ret = dm_i2c_write(dev, I2C_IO_DATA_OUT_REG_0, buf, 1);
	if (ret) {
	printf("Failed to set IO expander via I2C\n");
	return -EIO;
	}

	mdelay(500); /* required delay to let output value settle */

	return 0;
	}

	/* Helper function for accessing switch devices in multi-chip connection mode */
	static int mii_multi_chip_mode_write(struct mii_dev *bus, int dev_smi_addr,
	int smi_addr, int reg, u16 value)
	{
	u16 smi_cmd = 0;

	if (bus->write(bus, dev_smi_addr, 0,
	MVEBU_SW_SMI_DATA_REG, value) != 0) {
	printf("Error writing to the PHY addr=%02x reg=%02x\n",
	smi_addr, reg);
	return -EFAULT;
	}

	smi_cmd = (1 << SW_SMI_CMD_SMI_BUSY_OFF) \|
	(1 << SW_SMI_CMD_SMI_MODE_OFF) \|
	(1 << SW_SMI_CMD_SMI_OP_OFF) \|
	(smi_addr << SW_SMI_CMD_DEV_ADDR_OFF) \|
	(reg << SW_SMI_CMD_REG_ADDR_OFF);
	if (bus->write(bus, dev_smi_addr, 0,
	MVEBU_SW_SMI_CMD_REG, smi_cmd) != 0) {
	printf("Error writing to the PHY addr=%02x reg=%02x\n",
	smi_addr, reg);
	return -EFAULT;
	}

	return 0;
	}

	/* Bring-up board-specific network stuff */
	int board_network_enable(struct mii_dev *bus)
	{
	if (!of_machine_is_compatible("globalscale,espressobin"))
	return 0;

	/*
	* FIXME: remove this code once Topaz driver gets available
	* A3720 Community Board Only
	* Configure Topaz switch (88E6341)
	* Restrict output to ports 1,2,3 only from port 0 (CPU)
	* Set port 0,1,2,3 to forwarding Mode (through Switch Port registers)
	*/
	mii_multi_chip_mode_write(bus, 1, MVEBU_PORT_CTRL_SMI_ADDR(1),
	MVEBU_SW_PORT_BASE_VLAN, BIT(0));
	mii_multi_chip_mode_write(bus, 1, MVEBU_PORT_CTRL_SMI_ADDR(2),
	MVEBU_SW_PORT_BASE_VLAN, BIT(0));
	mii_multi_chip_mode_write(bus, 1, MVEBU_PORT_CTRL_SMI_ADDR(3),
	MVEBU_SW_PORT_BASE_VLAN, BIT(0));

	mii_multi_chip_mode_write(bus, 1, MVEBU_PORT_CTRL_SMI_ADDR(0),
	MVEBU_SW_PORT_CTRL_REG, 0x7f);
	mii_multi_chip_mode_write(bus, 1, MVEBU_PORT_CTRL_SMI_ADDR(1),
	MVEBU_SW_PORT_CTRL_REG, 0x7f);
	mii_multi_chip_mode_write(bus, 1, MVEBU_PORT_CTRL_SMI_ADDR(2),
	MVEBU_SW_PORT_CTRL_REG, 0x7f);
	mii_multi_chip_mode_write(bus, 1, MVEBU_PORT_CTRL_SMI_ADDR(3),
	MVEBU_SW_PORT_CTRL_REG, 0x7f);

	/* RGMII Delay on Port 0 (CPU port), force link to 1000Mbps */
	mii_multi_chip_mode_write(bus, 1, MVEBU_PORT_CTRL_SMI_ADDR(0),
	MVEBU_SW_LINK_CTRL_REG, 0xe002);

	/* Power up PHY 1, 2, 3 (through Global 2 registers) */
	mii_multi_chip_mode_write(bus, 1, MVEBU_SW_G2_SMI_ADDR,
	MVEBU_G2_SMI_PHY_DATA_REG, 0x1140);
	mii_multi_chip_mode_write(bus, 1, MVEBU_SW_G2_SMI_ADDR,
	MVEBU_G2_SMI_PHY_CMD_REG, 0x9620);
	mii_multi_chip_mode_write(bus, 1, MVEBU_SW_G2_SMI_ADDR,
	MVEBU_G2_SMI_PHY_CMD_REG, 0x9640);
	mii_multi_chip_mode_write(bus, 1, MVEBU_SW_G2_SMI_ADDR,
	MVEBU_G2_SMI_PHY_CMD_REG, 0x9660);

	return 0;
	}

	#if defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_ENV_IS_IN_SPI_FLASH)
	int ft_board_setup(void blob, struct bd_info bd)
	{
	int ret;
	int spi_off;
	int parts_off;
	int part_off;

	/* Fill SPI MTD partitions for Linux kernel on Espressobin */
	if (!of_machine_is_compatible("globalscale,espressobin"))
	return 0;

	spi_off = fdt_node_offset_by_compatible(blob, -1, "jedec,spi-nor");
	if (spi_off < 0)
	return 0;

	/* Do not touch partitions if they are already defined */
	if (fdt_subnode_offset(blob, spi_off, "partitions") >= 0)
	return 0;

	parts_off = fdt_add_subnode(blob, spi_off, "partitions");
	if (parts_off < 0) {
	printf("Can't add partitions node: %s\n", fdt_strerror(parts_off));
	return 0;
	}

	ret = fdt_setprop_string(blob, parts_off, "compatible", "fixed-partitions");
	if (ret < 0) {
	printf("Can't set compatible property: %s\n", fdt_strerror(ret));
	return 0;
	}

	ret = fdt_setprop_u32(blob, parts_off, "#address-cells", 1);
	if (ret < 0) {
	printf("Can't set #address-cells property: %s\n", fdt_strerror(ret));
	return 0;
	}

	ret = fdt_setprop_u32(blob, parts_off, "#size-cells", 1);
	if (ret < 0) {
	printf("Can't set #size-cells property: %s\n", fdt_strerror(ret));
	return 0;
	}

	/* Add u-boot-env partition */

	part_off = fdt_add_subnode(blob, parts_off, "partition@u-boot-env");
	if (part_off < 0) {
	printf("Can't add partition@u-boot-env node: %s\n", fdt_strerror(part_off));
	return 0;
	}

	ret = fdt_setprop_u32(blob, part_off, "reg", CONFIG_ENV_OFFSET);
	if (ret < 0) {
	printf("Can't set partition@u-boot-env reg property: %s\n", fdt_strerror(ret));
	return 0;
	}

	ret = fdt_appendprop_u32(blob, part_off, "reg", CONFIG_ENV_SIZE);
	if (ret < 0) {
	printf("Can't set partition@u-boot-env reg property: %s\n", fdt_strerror(ret));
	return 0;
	}

	ret = fdt_setprop_string(blob, part_off, "label", "u-boot-env");
	if (ret < 0) {
	printf("Can't set partition@u-boot-env label property: %s\n", fdt_strerror(ret));
	return 0;
	}

	/* Add firmware partition */

	part_off = fdt_add_subnode(blob, parts_off, "partition@firmware");
	if (part_off < 0) {
	printf("Can't add partition@firmware node: %s\n", fdt_strerror(part_off));
	return 0;
	}

	ret = fdt_setprop_u32(blob, part_off, "reg", 0);
	if (ret < 0) {
	printf("Can't set partition@firmware reg property: %s\n", fdt_strerror(ret));
	return 0;
	}

	ret = fdt_appendprop_u32(blob, part_off, "reg", CONFIG_ENV_OFFSET);
	if (ret < 0) {
	printf("Can't set partition@firmware reg property: %s\n", fdt_strerror(ret));
	return 0;
	}

	ret = fdt_setprop_string(blob, part_off, "label", "firmware");
	if (ret < 0) {
	printf("Can't set partition@firmware label property: %s\n", fdt_strerror(ret));
	return 0;
	}

	return 0;
	}
	#endif