drivers/usb/host/ehci-omap.c - platform/external/u-boot - Gitiles

 // SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2011 Ilya Yanok, Emcraft Systems
  * (C) Copyright 2004-2008
  * Texas Instruments, <www.ti.com>
  *
  * Derived from Beagle Board code by
  *	Sunil Kumar <sunilsaini05@gmail.com>
  *	Shashi Ranjan <shashiranjanmca05@gmail.com>
  *
  */

 #include <log.h>
 #include <time.h>
 #include <usb.h>
 #include <linux/delay.h>
 #include <usb/ulpi.h>
 #include <errno.h>
 #include <asm/io.h>
 #include <asm/gpio.h>
 #include <asm/arch/ehci.h>
 #include <asm/ehci-omap.h>
 #include <dm.h>
 #include <dm/device-internal.h>
 #include <dm/lists.h>
 #include <power/regulator.h>

 #include "ehci.h"

 static struct omap_uhh *const uhh = (struct omap_uhh *)OMAP_UHH_BASE;
 static struct omap_usbtll *const usbtll = (struct omap_usbtll *)OMAP_USBTLL_BASE;
 static struct omap_ehci *const ehci = (struct omap_ehci *)OMAP_EHCI_BASE;

 static int omap_uhh_reset(void)
 {
 	int timeout = 0;
 	u32 rev;

 	rev = readl(&uhh->rev);

 	/* Soft RESET */
 	writel(OMAP_UHH_SYSCONFIG_SOFTRESET, &uhh->sysc);

 	switch (rev) {
 	case OMAP_USBHS_REV1:
 		/* Wait for soft RESET to complete */
 		while (!(readl(&uhh->syss) & 0x1)) {
 			if (timeout > 100) {
 				printf("%s: RESET timeout\n", __func__);
 				return -1;
 			}
 			udelay(10);
 			timeout++;
 		}

 		/* Set No-Idle, No-Standby */
 		writel(OMAP_UHH_SYSCONFIG_VAL, &uhh->sysc);
 		break;

 	default:	/* Rev. 2 onwards */

 		udelay(2); /* Need to wait before accessing SYSCONFIG back */

 		/* Wait for soft RESET to complete */
 		while ((readl(&uhh->sysc) & 0x1)) {
 			if (timeout > 100) {
 				printf("%s: RESET timeout\n", __func__);
 				return -1;
 			}
 			udelay(10);
 			timeout++;
 		}

 		writel(OMAP_UHH_SYSCONFIG_VAL, &uhh->sysc);
 		break;
 	}

 	return 0;
 }

 static int omap_ehci_tll_reset(void)
 {
 	unsigned long init = get_timer(0);

 	/* perform TLL soft reset, and wait until reset is complete */
 	writel(OMAP_USBTLL_SYSCONFIG_SOFTRESET, &usbtll->sysc);

 	/* Wait for TLL reset to complete */
 	while (!(readl(&usbtll->syss) & OMAP_USBTLL_SYSSTATUS_RESETDONE))
 		if (get_timer(init) > CONFIG_SYS_HZ) {
 			debug("OMAP EHCI error: timeout resetting TLL\n");
 			return -EL3RST;
 	}

 	return 0;
 }

 static void omap_usbhs_hsic_init(int port)
 {
 	unsigned int reg;

 	/* Enable channels now */
 	reg = readl(&usbtll->channel_conf + port);

 	setbits_le32(&reg, (OMAP_TLL_CHANNEL_CONF_CHANMODE_TRANSPARENT_UTMI
 		| OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF
 		| OMAP_TLL_CHANNEL_CONF_DRVVBUS
 		| OMAP_TLL_CHANNEL_CONF_CHRGVBUS
 		| OMAP_TLL_CHANNEL_CONF_CHANEN));

 	writel(reg, &usbtll->channel_conf + port);
 }

 #ifdef CONFIG_USB_ULPI
 static void omap_ehci_soft_phy_reset(int port)
 {
 	struct ulpi_viewport ulpi_vp;

 	ulpi_vp.viewport_addr = (u32)&ehci->insreg05_utmi_ulpi;
 	ulpi_vp.port_num = port;

 	ulpi_reset(&ulpi_vp);
 }
 #else
 static void omap_ehci_soft_phy_reset(int port)
 {
 	return;
 }
 #endif

 struct ehci_omap_priv_data {
 	struct ehci_ctrl ctrl;
 	struct omap_ehci *ehci;
 #ifdef CONFIG_DM_REGULATOR
 	struct udevice *vbus_supply;
 #endif
 	enum usb_init_type init_type;
 	int portnr;
 	struct phy phy[OMAP_HS_USB_PORTS];
 	int nports;
 };

 /*
  * Initialize the OMAP EHCI controller and PHY.
  * Based on "drivers/usb/host/ehci-omap.c" from Linux 3.1
  * See there for additional Copyrights.
  */
 static int omap_ehci_hcd_init(int index, struct omap_usbhs_board_data *usbhs_pdata,
 			      struct udevice *dev)
 {
 	int ret;
 	unsigned int i, reg = 0, rev = 0;

 	debug("Initializing OMAP EHCI\n");

 	ret = board_usb_init(index, USB_INIT_HOST);
 	if (ret < 0)
 		return ret;

 	/* Hold the PHY in RESET for enough time till DIR is high */
 	/* Refer: ISSUE1 */
 	udelay(10);

 	ret = omap_uhh_reset();
 	if (ret < 0)
 		return ret;

 	ret = omap_ehci_tll_reset();
 	if (ret)
 		return ret;

 	writel(OMAP_USBTLL_SYSCONFIG_ENAWAKEUP |
 		OMAP_USBTLL_SYSCONFIG_SIDLEMODE |
 		OMAP_USBTLL_SYSCONFIG_CACTIVITY, &usbtll->sysc);

 	/* Put UHH in NoIdle/NoStandby mode */
 	writel(OMAP_UHH_SYSCONFIG_VAL, &uhh->sysc);

 	/* setup ULPI bypass and burst configurations */
 	clrsetbits_le32(&reg, OMAP_UHH_HOSTCONFIG_INCRX_ALIGN_EN,
 		(OMAP_UHH_HOSTCONFIG_INCR4_BURST_EN |
 		OMAP_UHH_HOSTCONFIG_INCR8_BURST_EN |
 		OMAP_UHH_HOSTCONFIG_INCR16_BURST_EN));

 	rev = readl(&uhh->rev);
 	if (rev == OMAP_USBHS_REV1) {
 		if (is_ehci_phy_mode(usbhs_pdata->port_mode[0]))
 			clrbits_le32(&reg, OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS);
 		else
 			setbits_le32(&reg, OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS);

 		if (is_ehci_phy_mode(usbhs_pdata->port_mode[1]))
 			clrbits_le32(&reg, OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS);
 		else
 			setbits_le32(&reg, OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS);

 		if (is_ehci_phy_mode(usbhs_pdata->port_mode[2]))
 			clrbits_le32(&reg, OMAP_UHH_HOSTCONFIG_ULPI_P3_BYPASS);
 		else
 			setbits_le32(&reg, OMAP_UHH_HOSTCONFIG_ULPI_P3_BYPASS);
 	} else if (rev == OMAP_USBHS_REV2) {

 		clrsetbits_le32(&reg, (OMAP_P1_MODE_CLEAR | OMAP_P2_MODE_CLEAR),
 					OMAP4_UHH_HOSTCONFIG_APP_START_CLK);

 		/* Clear port mode fields for PHY mode */

 		if (is_ehci_hsic_mode(usbhs_pdata->port_mode[0]))
 			setbits_le32(&reg, OMAP_P1_MODE_HSIC);

 		if (is_ehci_hsic_mode(usbhs_pdata->port_mode[1]))
 			setbits_le32(&reg, OMAP_P2_MODE_HSIC);

 	} else if (rev == OMAP_USBHS_REV2_1) {

 		clrsetbits_le32(&reg,
 				(OMAP_P1_MODE_CLEAR |
 				 OMAP_P2_MODE_CLEAR |
 				 OMAP_P3_MODE_CLEAR),
 				OMAP4_UHH_HOSTCONFIG_APP_START_CLK);

 		/* Clear port mode fields for PHY mode */

 		if (is_ehci_hsic_mode(usbhs_pdata->port_mode[0]))
 			setbits_le32(&reg, OMAP_P1_MODE_HSIC);

 		if (is_ehci_hsic_mode(usbhs_pdata->port_mode[1]))
 			setbits_le32(&reg, OMAP_P2_MODE_HSIC);

 		if (is_ehci_hsic_mode(usbhs_pdata->port_mode[2]))
 			setbits_le32(&reg, OMAP_P3_MODE_HSIC);
 	}

 	debug("OMAP UHH_REVISION 0x%x\n", rev);
 	writel(reg, &uhh->hostconfig);

 	for (i = 0; i < OMAP_HS_USB_PORTS; i++)
 		if (is_ehci_hsic_mode(usbhs_pdata->port_mode[i]))
 			omap_usbhs_hsic_init(i);

 	/*
 	 * Refer ISSUE1:
 	 * Hold the PHY in RESET for enough time till
 	 * PHY is settled and ready
 	 */
 	udelay(10);

 	/*
 	 * An undocumented "feature" in the OMAP3 EHCI controller,
 	 * causes suspended ports to be taken out of suspend when
 	 * the USBCMD.Run/Stop bit is cleared (for example when
 	 * we do ehci_bus_suspend).
 	 * This breaks suspend-resume if the root-hub is allowed
 	 * to suspend. Writing 1 to this undocumented register bit
 	 * disables this feature and restores normal behavior.
 	 */
 	writel(EHCI_INSNREG04_DISABLE_UNSUSPEND, &ehci->insreg04);

 	for (i = 0; i < OMAP_HS_USB_PORTS; i++)
 		if (is_ehci_phy_mode(usbhs_pdata->port_mode[i]))
 			omap_ehci_soft_phy_reset(i);

 	debug("OMAP EHCI init done\n");
 	return 0;
 }

 static struct omap_usbhs_board_data usbhs_bdata = {
 	.port_mode[0] = OMAP_USBHS_PORT_MODE_UNUSED,
 	.port_mode[1] = OMAP_USBHS_PORT_MODE_UNUSED,
 	.port_mode[2] = OMAP_USBHS_PORT_MODE_UNUSED,
 };

 static void omap_usbhs_set_mode(u8 index, const char *mode)
 {
 	if (!strcmp(mode, "ehci-phy"))
 		usbhs_bdata.port_mode[index] = OMAP_EHCI_PORT_MODE_PHY;
 	else if (!strcmp(mode, "ehci-tll"))
 		usbhs_bdata.port_mode[index] = OMAP_EHCI_PORT_MODE_TLL;
 	else if (!strcmp(mode, "ehci-hsic"))
 		usbhs_bdata.port_mode[index] = OMAP_EHCI_PORT_MODE_HSIC;
 }

 static int omap_usbhs_probe(struct udevice *dev)
 {
 	u8 i;
 	const char *mode;
 	char prop[11];

 	/* Go through each port portX-mode to determing phy mode */
 	for (i = 0; i < OMAP_HS_USB_PORTS; i++) {
 		snprintf(prop, sizeof(prop), "port%d-mode", i + 1);
 		mode = dev_read_string(dev, prop);

 		/* If the portX-mode exists, set the mode */
 		if (mode)
 			omap_usbhs_set_mode(i, mode);
 	}

 	return 0;
 }

 static const struct udevice_id omap_usbhs_dt_ids[] = {
 	{ .compatible = "ti,usbhs-host" },
 	{ }
 };

 U_BOOT_DRIVER(usb_omaphs_host) = {
 	.name	= "usbhs-host",
 	.id	= UCLASS_SIMPLE_BUS,
 	.of_match = omap_usbhs_dt_ids,
 	.probe	= omap_usbhs_probe,
 	.flags	= DM_FLAG_ALLOC_PRIV_DMA,
 };

 static int ehci_usb_of_to_plat(struct udevice *dev)
 {
 	struct usb_plat *plat = dev_get_plat(dev);

 	plat->init_type = USB_INIT_HOST;

 	return 0;
 }

 /*
  * This driver references phys based on the USB port.  If
  * the port is unused, the corresponding phy is listed as NULL
  * which generic_phy_init_bulk treats as an error, so we need
  * a custom one that tolerates empty phys
  */
 static int omap_ehci_phy_get(struct udevice *dev)
 {
 	struct ehci_omap_priv_data *priv = dev_get_priv(dev);
 	int i, ret;

 	for (i = 0; i < OMAP_HS_USB_PORTS; i++) {
 		ret = generic_phy_get_by_index(dev, i, &priv->phy[i]);
 		if (ret && ret != -ENOENT)
 			return ret;
 	};

 	return 0;
 };

 static int omap_ehci_probe(struct udevice *dev)
 {
 	struct usb_plat *plat = dev_get_plat(dev);
 	struct ehci_omap_priv_data *priv = dev_get_priv(dev);
 	struct ehci_hccr *hccr;
 	struct ehci_hcor *hcor;
 	int ret;

 	priv->ehci = dev_read_addr_ptr(dev);
 	priv->portnr = dev_seq(dev);
 	priv->init_type = plat->init_type;

 	hccr = (struct ehci_hccr *)&priv->ehci->hccapbase;
 	hcor = (struct ehci_hcor *)&priv->ehci->usbcmd;

 	/* Identify Phys */
 	ret = omap_ehci_phy_get(dev);
 	if (ret) {
 		printf("Failed to get phys\n");
 		return ret;
 	}

 	/* Register the EHCI */
 	ret = ehci_register(dev, hccr, hcor, NULL, 0, USB_INIT_HOST);
 	if (ret) {
 		printf("Failed to register EHCI\n");
 		return ret;
 	}

 	ret = omap_ehci_hcd_init(0, &usbhs_bdata, dev);
 	if (ret)
 		return ret;

 	return ehci_register(dev, hccr, hcor, NULL, 0, USB_INIT_HOST);
 }

 static const struct udevice_id omap_ehci_dt_ids[] = {
 	{ .compatible = "ti,ehci-omap" },
 	{ }
 };

 U_BOOT_DRIVER(usb_omap_ehci) = {
 	.name	= "omap-ehci",
 	.id	= UCLASS_USB,
 	.of_match = omap_ehci_dt_ids,
 	.probe = omap_ehci_probe,
 	.of_to_plat = ehci_usb_of_to_plat,
 	.plat_auto	= sizeof(struct usb_plat),
 	.priv_auto	= sizeof(struct ehci_omap_priv_data),
 	.remove = ehci_deregister,
 	.ops	= &ehci_usb_ops,
 	.flags	= DM_FLAG_ALLOC_PRIV_DMA,
 };
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* (C) Copyright 2011 Ilya Yanok, Emcraft Systems
	* (C) Copyright 2004-2008
	* Texas Instruments, <www.ti.com>
	*
	* Derived from Beagle Board code by
	* Sunil Kumar <sunilsaini05@gmail.com>
	* Shashi Ranjan <shashiranjanmca05@gmail.com>
	*
	*/

	#include <log.h>
	#include <time.h>
	#include <usb.h>
	#include <linux/delay.h>
	#include <usb/ulpi.h>
	#include <errno.h>
	#include <asm/io.h>
	#include <asm/gpio.h>
	#include <asm/arch/ehci.h>
	#include <asm/ehci-omap.h>
	#include <dm.h>
	#include <dm/device-internal.h>
	#include <dm/lists.h>
	#include <power/regulator.h>

	#include "ehci.h"

	static struct omap_uhh const uhh = (struct omap_uhh )OMAP_UHH_BASE;
	static struct omap_usbtll const usbtll = (struct omap_usbtll )OMAP_USBTLL_BASE;
	static struct omap_ehci const ehci = (struct omap_ehci )OMAP_EHCI_BASE;

	static int omap_uhh_reset(void)
	{
	int timeout = 0;
	u32 rev;

	rev = readl(&uhh->rev);

	/* Soft RESET */
	writel(OMAP_UHH_SYSCONFIG_SOFTRESET, &uhh->sysc);

	switch (rev) {
	case OMAP_USBHS_REV1:
	/* Wait for soft RESET to complete */
	while (!(readl(&uhh->syss) & 0x1)) {
	if (timeout > 100) {
	printf("%s: RESET timeout\n", __func__);
	return -1;
	}
	udelay(10);
	timeout++;
	}

	/* Set No-Idle, No-Standby */
	writel(OMAP_UHH_SYSCONFIG_VAL, &uhh->sysc);
	break;

	default: /* Rev. 2 onwards */

	udelay(2); /* Need to wait before accessing SYSCONFIG back */

	/* Wait for soft RESET to complete */
	while ((readl(&uhh->sysc) & 0x1)) {
	if (timeout > 100) {
	printf("%s: RESET timeout\n", __func__);
	return -1;
	}
	udelay(10);
	timeout++;
	}

	writel(OMAP_UHH_SYSCONFIG_VAL, &uhh->sysc);
	break;
	}

	return 0;
	}

	static int omap_ehci_tll_reset(void)
	{
	unsigned long init = get_timer(0);

	/* perform TLL soft reset, and wait until reset is complete */
	writel(OMAP_USBTLL_SYSCONFIG_SOFTRESET, &usbtll->sysc);

	/* Wait for TLL reset to complete */
	while (!(readl(&usbtll->syss) & OMAP_USBTLL_SYSSTATUS_RESETDONE))
	if (get_timer(init) > CONFIG_SYS_HZ) {
	debug("OMAP EHCI error: timeout resetting TLL\n");
	return -EL3RST;
	}

	return 0;
	}

	static void omap_usbhs_hsic_init(int port)
	{
	unsigned int reg;

	/* Enable channels now */
	reg = readl(&usbtll->channel_conf + port);

	setbits_le32(&reg, (OMAP_TLL_CHANNEL_CONF_CHANMODE_TRANSPARENT_UTMI
	\| OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF
	\| OMAP_TLL_CHANNEL_CONF_DRVVBUS
	\| OMAP_TLL_CHANNEL_CONF_CHRGVBUS
	\| OMAP_TLL_CHANNEL_CONF_CHANEN));

	writel(reg, &usbtll->channel_conf + port);
	}

	#ifdef CONFIG_USB_ULPI
	static void omap_ehci_soft_phy_reset(int port)
	{
	struct ulpi_viewport ulpi_vp;

	ulpi_vp.viewport_addr = (u32)&ehci->insreg05_utmi_ulpi;
	ulpi_vp.port_num = port;

	ulpi_reset(&ulpi_vp);
	}
	#else
	static void omap_ehci_soft_phy_reset(int port)
	{
	return;
	}
	#endif

	struct ehci_omap_priv_data {
	struct ehci_ctrl ctrl;
	struct omap_ehci *ehci;
	#ifdef CONFIG_DM_REGULATOR
	struct udevice *vbus_supply;
	#endif
	enum usb_init_type init_type;
	int portnr;
	struct phy phy[OMAP_HS_USB_PORTS];
	int nports;
	};

	/*
	* Initialize the OMAP EHCI controller and PHY.
	* Based on "drivers/usb/host/ehci-omap.c" from Linux 3.1
	* See there for additional Copyrights.
	*/
	static int omap_ehci_hcd_init(int index, struct omap_usbhs_board_data *usbhs_pdata,
	struct udevice *dev)
	{
	int ret;
	unsigned int i, reg = 0, rev = 0;

	debug("Initializing OMAP EHCI\n");

	ret = board_usb_init(index, USB_INIT_HOST);
	if (ret < 0)
	return ret;

	/* Hold the PHY in RESET for enough time till DIR is high */
	/* Refer: ISSUE1 */
	udelay(10);

	ret = omap_uhh_reset();
	if (ret < 0)
	return ret;

	ret = omap_ehci_tll_reset();
	if (ret)
	return ret;

	writel(OMAP_USBTLL_SYSCONFIG_ENAWAKEUP \|
	OMAP_USBTLL_SYSCONFIG_SIDLEMODE \|
	OMAP_USBTLL_SYSCONFIG_CACTIVITY, &usbtll->sysc);

	/* Put UHH in NoIdle/NoStandby mode */
	writel(OMAP_UHH_SYSCONFIG_VAL, &uhh->sysc);

	/* setup ULPI bypass and burst configurations */
	clrsetbits_le32(&reg, OMAP_UHH_HOSTCONFIG_INCRX_ALIGN_EN,
	(OMAP_UHH_HOSTCONFIG_INCR4_BURST_EN \|
	OMAP_UHH_HOSTCONFIG_INCR8_BURST_EN \|
	OMAP_UHH_HOSTCONFIG_INCR16_BURST_EN));

	rev = readl(&uhh->rev);
	if (rev == OMAP_USBHS_REV1) {
	if (is_ehci_phy_mode(usbhs_pdata->port_mode[0]))
	clrbits_le32(&reg, OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS);
	else
	setbits_le32(&reg, OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS);

	if (is_ehci_phy_mode(usbhs_pdata->port_mode[1]))
	clrbits_le32(&reg, OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS);
	else
	setbits_le32(&reg, OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS);

	if (is_ehci_phy_mode(usbhs_pdata->port_mode[2]))
	clrbits_le32(&reg, OMAP_UHH_HOSTCONFIG_ULPI_P3_BYPASS);
	else
	setbits_le32(&reg, OMAP_UHH_HOSTCONFIG_ULPI_P3_BYPASS);
	} else if (rev == OMAP_USBHS_REV2) {

	clrsetbits_le32(&reg, (OMAP_P1_MODE_CLEAR \| OMAP_P2_MODE_CLEAR),
	OMAP4_UHH_HOSTCONFIG_APP_START_CLK);

	/* Clear port mode fields for PHY mode */

	if (is_ehci_hsic_mode(usbhs_pdata->port_mode[0]))
	setbits_le32(&reg, OMAP_P1_MODE_HSIC);

	if (is_ehci_hsic_mode(usbhs_pdata->port_mode[1]))
	setbits_le32(&reg, OMAP_P2_MODE_HSIC);

	} else if (rev == OMAP_USBHS_REV2_1) {

	clrsetbits_le32(&reg,
	(OMAP_P1_MODE_CLEAR \|
	OMAP_P2_MODE_CLEAR \|
	OMAP_P3_MODE_CLEAR),
	OMAP4_UHH_HOSTCONFIG_APP_START_CLK);

	/* Clear port mode fields for PHY mode */

	if (is_ehci_hsic_mode(usbhs_pdata->port_mode[0]))
	setbits_le32(&reg, OMAP_P1_MODE_HSIC);

	if (is_ehci_hsic_mode(usbhs_pdata->port_mode[1]))
	setbits_le32(&reg, OMAP_P2_MODE_HSIC);

	if (is_ehci_hsic_mode(usbhs_pdata->port_mode[2]))
	setbits_le32(&reg, OMAP_P3_MODE_HSIC);
	}

	debug("OMAP UHH_REVISION 0x%x\n", rev);
	writel(reg, &uhh->hostconfig);

	for (i = 0; i < OMAP_HS_USB_PORTS; i++)
	if (is_ehci_hsic_mode(usbhs_pdata->port_mode[i]))
	omap_usbhs_hsic_init(i);

	/*
	* Refer ISSUE1:
	* Hold the PHY in RESET for enough time till
	* PHY is settled and ready
	*/
	udelay(10);

	/*
	* An undocumented "feature" in the OMAP3 EHCI controller,
	* causes suspended ports to be taken out of suspend when
	* the USBCMD.Run/Stop bit is cleared (for example when
	* we do ehci_bus_suspend).
	* This breaks suspend-resume if the root-hub is allowed
	* to suspend. Writing 1 to this undocumented register bit
	* disables this feature and restores normal behavior.
	*/
	writel(EHCI_INSNREG04_DISABLE_UNSUSPEND, &ehci->insreg04);

	for (i = 0; i < OMAP_HS_USB_PORTS; i++)
	if (is_ehci_phy_mode(usbhs_pdata->port_mode[i]))
	omap_ehci_soft_phy_reset(i);

	debug("OMAP EHCI init done\n");
	return 0;
	}

	static struct omap_usbhs_board_data usbhs_bdata = {
	.port_mode[0] = OMAP_USBHS_PORT_MODE_UNUSED,
	.port_mode[1] = OMAP_USBHS_PORT_MODE_UNUSED,
	.port_mode[2] = OMAP_USBHS_PORT_MODE_UNUSED,
	};

	static void omap_usbhs_set_mode(u8 index, const char *mode)
	{
	if (!strcmp(mode, "ehci-phy"))
	usbhs_bdata.port_mode[index] = OMAP_EHCI_PORT_MODE_PHY;
	else if (!strcmp(mode, "ehci-tll"))
	usbhs_bdata.port_mode[index] = OMAP_EHCI_PORT_MODE_TLL;
	else if (!strcmp(mode, "ehci-hsic"))
	usbhs_bdata.port_mode[index] = OMAP_EHCI_PORT_MODE_HSIC;
	}

	static int omap_usbhs_probe(struct udevice *dev)
	{
	u8 i;
	const char *mode;
	char prop[11];

	/* Go through each port portX-mode to determing phy mode */
	for (i = 0; i < OMAP_HS_USB_PORTS; i++) {
	snprintf(prop, sizeof(prop), "port%d-mode", i + 1);
	mode = dev_read_string(dev, prop);

	/* If the portX-mode exists, set the mode */
	if (mode)
	omap_usbhs_set_mode(i, mode);
	}

	return 0;
	}

	static const struct udevice_id omap_usbhs_dt_ids[] = {
	{ .compatible = "ti,usbhs-host" },
	{ }
	};

	U_BOOT_DRIVER(usb_omaphs_host) = {
	.name = "usbhs-host",
	.id = UCLASS_SIMPLE_BUS,
	.of_match = omap_usbhs_dt_ids,
	.probe = omap_usbhs_probe,
	.flags = DM_FLAG_ALLOC_PRIV_DMA,
	};

	static int ehci_usb_of_to_plat(struct udevice *dev)
	{
	struct usb_plat *plat = dev_get_plat(dev);

	plat->init_type = USB_INIT_HOST;

	return 0;
	}

	/*
	* This driver references phys based on the USB port. If
	* the port is unused, the corresponding phy is listed as NULL
	* which generic_phy_init_bulk treats as an error, so we need
	* a custom one that tolerates empty phys
	*/
	static int omap_ehci_phy_get(struct udevice *dev)
	{
	struct ehci_omap_priv_data *priv = dev_get_priv(dev);
	int i, ret;

	for (i = 0; i < OMAP_HS_USB_PORTS; i++) {
	ret = generic_phy_get_by_index(dev, i, &priv->phy[i]);
	if (ret && ret != -ENOENT)
	return ret;
	};

	return 0;
	};

	static int omap_ehci_probe(struct udevice *dev)
	{
	struct usb_plat *plat = dev_get_plat(dev);
	struct ehci_omap_priv_data *priv = dev_get_priv(dev);
	struct ehci_hccr *hccr;
	struct ehci_hcor *hcor;
	int ret;

	priv->ehci = dev_read_addr_ptr(dev);
	priv->portnr = dev_seq(dev);
	priv->init_type = plat->init_type;

	hccr = (struct ehci_hccr *)&priv->ehci->hccapbase;
	hcor = (struct ehci_hcor *)&priv->ehci->usbcmd;

	/* Identify Phys */
	ret = omap_ehci_phy_get(dev);
	if (ret) {
	printf("Failed to get phys\n");
	return ret;
	}

	/* Register the EHCI */
	ret = ehci_register(dev, hccr, hcor, NULL, 0, USB_INIT_HOST);
	if (ret) {
	printf("Failed to register EHCI\n");
	return ret;
	}

	ret = omap_ehci_hcd_init(0, &usbhs_bdata, dev);
	if (ret)
	return ret;

	return ehci_register(dev, hccr, hcor, NULL, 0, USB_INIT_HOST);
	}

	static const struct udevice_id omap_ehci_dt_ids[] = {
	{ .compatible = "ti,ehci-omap" },
	{ }
	};

	U_BOOT_DRIVER(usb_omap_ehci) = {
	.name = "omap-ehci",
	.id = UCLASS_USB,
	.of_match = omap_ehci_dt_ids,
	.probe = omap_ehci_probe,
	.of_to_plat = ehci_usb_of_to_plat,
	.plat_auto = sizeof(struct usb_plat),
	.priv_auto = sizeof(struct ehci_omap_priv_data),
	.remove = ehci_deregister,
	.ops = &ehci_usb_ops,
	.flags = DM_FLAG_ALLOC_PRIV_DMA,
	};