1 files changed, 735 insertions, 0 deletions

diff --git a/drivers/usb/host/ohci-omap3.c b/drivers/usb/host/ohci-omap3.c
new file mode 100644
index 000000000000..2cc8a504b18c
--- /dev/null
+++ b/drivers/usb/host/ohci-omap3.c
@@ -0,0 +1,735 @@
+/*
+ * ohci-omap3.c - driver for OHCI on OMAP3 and later processors
+ *
+ * Bus Glue for OMAP3 USBHOST 3 port OHCI controller
+ * This controller is also used in later OMAPs and AM35x chips
+ *
+ * Copyright (C) 2007-2010 Texas Instruments, Inc.
+ * Author: Vikram Pandita <vikram.pandita@ti.com>
+ * Author: Anand Gadiyar <gadiyar@ti.com>
+ *
+ * Based on ehci-omap.c and some other ohci glue layers
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ *
+ * TODO (last updated Mar 10th, 2010):
+ *	- add kernel-doc
+ *	- Factor out code common to EHCI to a separate file
+ *	- Make EHCI and OHCI coexist together
+ *	  - needs newer silicon versions to actually work
+ *	  - the last one to be loaded currently steps on the other's toes
+ *	- Add hooks for configuring transceivers, etc. at init/exit
+ *	- Add aggressive clock-management code
+ */
+
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+
+#include <plat/usb.h>
+
+/*
+ * OMAP USBHOST Register addresses: VIRTUAL ADDRESSES
+ *	Use ohci_omap_readl()/ohci_omap_writel() functions
+ */
+
+/* TLL Register Set */
+#define	OMAP_USBTLL_REVISION				(0x00)
+#define	OMAP_USBTLL_SYSCONFIG				(0x10)
+#define	OMAP_USBTLL_SYSCONFIG_CACTIVITY			(1 << 8)
+#define	OMAP_USBTLL_SYSCONFIG_SIDLEMODE			(1 << 3)
+#define	OMAP_USBTLL_SYSCONFIG_ENAWAKEUP			(1 << 2)
+#define	OMAP_USBTLL_SYSCONFIG_SOFTRESET			(1 << 1)
+#define	OMAP_USBTLL_SYSCONFIG_AUTOIDLE			(1 << 0)
+
+#define	OMAP_USBTLL_SYSSTATUS				(0x14)
+#define	OMAP_USBTLL_SYSSTATUS_RESETDONE			(1 << 0)
+
+#define	OMAP_USBTLL_IRQSTATUS				(0x18)
+#define	OMAP_USBTLL_IRQENABLE				(0x1C)
+
+#define	OMAP_TLL_SHARED_CONF				(0x30)
+#define	OMAP_TLL_SHARED_CONF_USB_90D_DDR_EN		(1 << 6)
+#define	OMAP_TLL_SHARED_CONF_USB_180D_SDR_EN		(1 << 5)
+#define	OMAP_TLL_SHARED_CONF_USB_DIVRATION		(1 << 2)
+#define	OMAP_TLL_SHARED_CONF_FCLK_REQ			(1 << 1)
+#define	OMAP_TLL_SHARED_CONF_FCLK_IS_ON			(1 << 0)
+
+#define	OMAP_TLL_CHANNEL_CONF(num)			(0x040 + 0x004 * num)
+#define OMAP_TLL_CHANNEL_CONF_FSLSMODE_SHIFT		24
+#define	OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF		(1 << 11)
+#define	OMAP_TLL_CHANNEL_CONF_ULPI_ULPIAUTOIDLE		(1 << 10)
+#define	OMAP_TLL_CHANNEL_CONF_UTMIAUTOIDLE		(1 << 9)
+#define	OMAP_TLL_CHANNEL_CONF_ULPIDDRMODE		(1 << 8)
+#define OMAP_TLL_CHANNEL_CONF_CHANMODE_FSLS		(1 << 1)
+#define	OMAP_TLL_CHANNEL_CONF_CHANEN			(1 << 0)
+
+#define OMAP_TLL_CHANNEL_COUNT				3
+
+/* UHH Register Set */
+#define	OMAP_UHH_REVISION				(0x00)
+#define	OMAP_UHH_SYSCONFIG				(0x10)
+#define	OMAP_UHH_SYSCONFIG_MIDLEMODE			(1 << 12)
+#define	OMAP_UHH_SYSCONFIG_CACTIVITY			(1 << 8)
+#define	OMAP_UHH_SYSCONFIG_SIDLEMODE			(1 << 3)
+#define	OMAP_UHH_SYSCONFIG_ENAWAKEUP			(1 << 2)
+#define	OMAP_UHH_SYSCONFIG_SOFTRESET			(1 << 1)
+#define	OMAP_UHH_SYSCONFIG_AUTOIDLE			(1 << 0)
+
+#define	OMAP_UHH_SYSSTATUS				(0x14)
+#define OMAP_UHH_SYSSTATUS_UHHRESETDONE			(1 << 0)
+#define OMAP_UHH_SYSSTATUS_OHCIRESETDONE		(1 << 1)
+#define OMAP_UHH_SYSSTATUS_EHCIRESETDONE		(1 << 2)
+#define	OMAP_UHH_HOSTCONFIG				(0x40)
+#define	OMAP_UHH_HOSTCONFIG_ULPI_BYPASS			(1 << 0)
+#define	OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS		(1 << 0)
+#define	OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS		(1 << 11)
+#define	OMAP_UHH_HOSTCONFIG_ULPI_P3_BYPASS		(1 << 12)
+#define OMAP_UHH_HOSTCONFIG_INCR4_BURST_EN		(1 << 2)
+#define OMAP_UHH_HOSTCONFIG_INCR8_BURST_EN		(1 << 3)
+#define OMAP_UHH_HOSTCONFIG_INCR16_BURST_EN		(1 << 4)
+#define OMAP_UHH_HOSTCONFIG_INCRX_ALIGN_EN		(1 << 5)
+#define OMAP_UHH_HOSTCONFIG_P1_CONNECT_STATUS		(1 << 8)
+#define OMAP_UHH_HOSTCONFIG_P2_CONNECT_STATUS		(1 << 9)
+#define OMAP_UHH_HOSTCONFIG_P3_CONNECT_STATUS		(1 << 10)
+
+#define	OMAP_UHH_DEBUG_CSR				(0x44)
+
+/*-------------------------------------------------------------------------*/
+
+static inline void ohci_omap_writel(void __iomem *base, u32 reg, u32 val)
+{
+	__raw_writel(val, base + reg);
+}
+
+static inline u32 ohci_omap_readl(void __iomem *base, u32 reg)
+{
+	return __raw_readl(base + reg);
+}
+
+static inline void ohci_omap_writeb(void __iomem *base, u8 reg, u8 val)
+{
+	__raw_writeb(val, base + reg);
+}
+
+static inline u8 ohci_omap_readb(void __iomem *base, u8 reg)
+{
+	return __raw_readb(base + reg);
+}
+
+/*-------------------------------------------------------------------------*/
+
+struct ohci_hcd_omap3 {
+	struct ohci_hcd		*ohci;
+	struct device		*dev;
+
+	struct clk		*usbhost_ick;
+	struct clk		*usbhost2_120m_fck;
+	struct clk		*usbhost1_48m_fck;
+	struct clk		*usbtll_fck;
+	struct clk		*usbtll_ick;
+
+	/* port_mode: TLL/PHY, 2/3/4/6-PIN, DP-DM/DAT-SE0 */
+	enum ohci_omap3_port_mode	port_mode[OMAP3_HS_USB_PORTS];
+	void __iomem		*uhh_base;
+	void __iomem		*tll_base;
+	void __iomem		*ohci_base;
+
+	unsigned		es2_compatibility:1;
+};
+
+/*-------------------------------------------------------------------------*/
+
+static void ohci_omap3_clock_power(struct ohci_hcd_omap3 *omap, int on)
+{
+	if (on) {
+		clk_enable(omap->usbtll_ick);
+		clk_enable(omap->usbtll_fck);
+		clk_enable(omap->usbhost_ick);
+		clk_enable(omap->usbhost1_48m_fck);
+		clk_enable(omap->usbhost2_120m_fck);
+	} else {
+		clk_disable(omap->usbhost2_120m_fck);
+		clk_disable(omap->usbhost1_48m_fck);
+		clk_disable(omap->usbhost_ick);
+		clk_disable(omap->usbtll_fck);
+		clk_disable(omap->usbtll_ick);
+	}
+}
+
+static int ohci_omap3_init(struct usb_hcd *hcd)
+{
+	dev_dbg(hcd->self.controller, "starting OHCI controller\n");
+
+	return ohci_init(hcd_to_ohci(hcd));
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+static int ohci_omap3_start(struct usb_hcd *hcd)
+{
+	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+	int ret;
+
+	/*
+	 * RemoteWakeupConnected has to be set explicitly before
+	 * calling ohci_run. The reset value of RWC is 0.
+	 */
+	ohci->hc_control = OHCI_CTRL_RWC;
+	writel(OHCI_CTRL_RWC, &ohci->regs->control);
+
+	ret = ohci_run(ohci);
+
+	if (ret < 0) {
+		dev_err(hcd->self.controller, "can't start\n");
+		ohci_stop(hcd);
+	}
+
+	return ret;
+}
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * convert the port-mode enum to a value we can use in the FSLSMODE
+ * field of USBTLL_CHANNEL_CONF
+ */
+static unsigned ohci_omap3_fslsmode(enum ohci_omap3_port_mode mode)
+{
+	switch (mode) {
+	case OMAP_OHCI_PORT_MODE_UNUSED:
+	case OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0:
+		return 0x0;
+
+	case OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM:
+		return 0x1;
+
+	case OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0:
+		return 0x2;
+
+	case OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM:
+		return 0x3;
+
+	case OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0:
+		return 0x4;
+
+	case OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM:
+		return 0x5;
+
+	case OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0:
+		return 0x6;
+
+	case OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM:
+		return 0x7;
+
+	case OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0:
+		return 0xA;
+
+	case OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM:
+		return 0xB;
+	default:
+		pr_warning("Invalid port mode, using default\n");
+		return 0x0;
+	}
+}
+
+static void ohci_omap3_tll_config(struct ohci_hcd_omap3 *omap)
+{
+	u32 reg;
+	int i;
+
+	/* Program TLL SHARED CONF */
+	reg = ohci_omap_readl(omap->tll_base, OMAP_TLL_SHARED_CONF);
+	reg &= ~OMAP_TLL_SHARED_CONF_USB_90D_DDR_EN;
+	reg &= ~OMAP_TLL_SHARED_CONF_USB_180D_SDR_EN;
+	reg |= OMAP_TLL_SHARED_CONF_USB_DIVRATION;
+	reg |= OMAP_TLL_SHARED_CONF_FCLK_IS_ON;
+	ohci_omap_writel(omap->tll_base, OMAP_TLL_SHARED_CONF, reg);
+
+	/* Program each TLL channel */
+	/*
+	 * REVISIT: Only the 3-pin and 4-pin PHY modes have
+	 * actually been tested.
+	 */
+	for (i = 0; i < OMAP_TLL_CHANNEL_COUNT; i++) {
+
+		/* Enable only those channels that are actually used */
+		if (omap->port_mode[i] == OMAP_OHCI_PORT_MODE_UNUSED)
+			continue;
+
+		reg = ohci_omap_readl(omap->tll_base, OMAP_TLL_CHANNEL_CONF(i));
+		reg |= ohci_omap3_fslsmode(omap->port_mode[i])
+				<< OMAP_TLL_CHANNEL_CONF_FSLSMODE_SHIFT;
+		reg |= OMAP_TLL_CHANNEL_CONF_CHANMODE_FSLS;
+		reg |= OMAP_TLL_CHANNEL_CONF_CHANEN;
+		ohci_omap_writel(omap->tll_base, OMAP_TLL_CHANNEL_CONF(i), reg);
+	}
+}
+
+/* omap3_start_ohci
+ *	- Start the TI USBHOST controller
+ */
+static int omap3_start_ohci(struct ohci_hcd_omap3 *omap, struct usb_hcd *hcd)
+{
+	unsigned long timeout = jiffies + msecs_to_jiffies(1000);
+	u32 reg = 0;
+	int ret = 0;
+
+	dev_dbg(omap->dev, "starting TI OHCI USB Controller\n");
+
+	/* Get all the clock handles we need */
+	omap->usbhost_ick = clk_get(omap->dev, "usbhost_ick");
+	if (IS_ERR(omap->usbhost_ick)) {
+		dev_err(omap->dev, "could not get usbhost_ick\n");
+		ret =  PTR_ERR(omap->usbhost_ick);
+		goto err_host_ick;
+	}
+
+	omap->usbhost2_120m_fck = clk_get(omap->dev, "usbhost_120m_fck");
+	if (IS_ERR(omap->usbhost2_120m_fck)) {
+		dev_err(omap->dev, "could not get usbhost_120m_fck\n");
+		ret = PTR_ERR(omap->usbhost2_120m_fck);
+		goto err_host_120m_fck;
+	}
+
+	omap->usbhost1_48m_fck = clk_get(omap->dev, "usbhost_48m_fck");
+	if (IS_ERR(omap->usbhost1_48m_fck)) {
+		dev_err(omap->dev, "could not get usbhost_48m_fck\n");
+		ret = PTR_ERR(omap->usbhost1_48m_fck);
+		goto err_host_48m_fck;
+	}
+
+	omap->usbtll_fck = clk_get(omap->dev, "usbtll_fck");
+	if (IS_ERR(omap->usbtll_fck)) {
+		dev_err(omap->dev, "could not get usbtll_fck\n");
+		ret = PTR_ERR(omap->usbtll_fck);
+		goto err_tll_fck;
+	}
+
+	omap->usbtll_ick = clk_get(omap->dev, "usbtll_ick");
+	if (IS_ERR(omap->usbtll_ick)) {
+		dev_err(omap->dev, "could not get usbtll_ick\n");
+		ret = PTR_ERR(omap->usbtll_ick);
+		goto err_tll_ick;
+	}
+
+	/* Now enable all the clocks in the correct order */
+	ohci_omap3_clock_power(omap, 1);
+
+	/* perform TLL soft reset, and wait until reset is complete */
+	ohci_omap_writel(omap->tll_base, OMAP_USBTLL_SYSCONFIG,
+			OMAP_USBTLL_SYSCONFIG_SOFTRESET);
+
+	/* Wait for TLL reset to complete */
+	while (!(ohci_omap_readl(omap->tll_base, OMAP_USBTLL_SYSSTATUS)
+			& OMAP_USBTLL_SYSSTATUS_RESETDONE)) {
+		cpu_relax();
+
+		if (time_after(jiffies, timeout)) {
+			dev_dbg(omap->dev, "operation timed out\n");
+			ret = -EINVAL;
+			goto err_sys_status;
+		}
+	}
+
+	dev_dbg(omap->dev, "TLL reset done\n");
+
+	/* (1<<3) = no idle mode only for initial debugging */
+	ohci_omap_writel(omap->tll_base, OMAP_USBTLL_SYSCONFIG,
+			OMAP_USBTLL_SYSCONFIG_ENAWAKEUP |
+			OMAP_USBTLL_SYSCONFIG_SIDLEMODE |
+			OMAP_USBTLL_SYSCONFIG_CACTIVITY);
+
+
+	/* Put UHH in NoIdle/NoStandby mode */
+	reg = ohci_omap_readl(omap->uhh_base, OMAP_UHH_SYSCONFIG);
+	reg |= (OMAP_UHH_SYSCONFIG_ENAWAKEUP
+			| OMAP_UHH_SYSCONFIG_SIDLEMODE
+			| OMAP_UHH_SYSCONFIG_CACTIVITY
+			| OMAP_UHH_SYSCONFIG_MIDLEMODE);
+	reg &= ~OMAP_UHH_SYSCONFIG_AUTOIDLE;
+	reg &= ~OMAP_UHH_SYSCONFIG_SOFTRESET;
+
+	ohci_omap_writel(omap->uhh_base, OMAP_UHH_SYSCONFIG, reg);
+
+	reg = ohci_omap_readl(omap->uhh_base, OMAP_UHH_HOSTCONFIG);
+
+	/* setup ULPI bypass and burst configurations */
+	reg |= (OMAP_UHH_HOSTCONFIG_INCR4_BURST_EN
+			| OMAP_UHH_HOSTCONFIG_INCR8_BURST_EN
+			| OMAP_UHH_HOSTCONFIG_INCR16_BURST_EN);
+	reg &= ~OMAP_UHH_HOSTCONFIG_INCRX_ALIGN_EN;
+
+	/*
+	 * REVISIT: Pi_CONNECT_STATUS controls MStandby
+	 * assertion and Swakeup generation - let us not
+	 * worry about this for now. OMAP HWMOD framework
+	 * might take care of this later. If not, we can
+	 * update these registers when adding aggressive
+	 * clock management code.
+	 *
+	 * For now, turn off all the Pi_CONNECT_STATUS bits
+	 *
+	if (omap->port_mode[0] == OMAP_OHCI_PORT_MODE_UNUSED)
+		reg &= ~OMAP_UHH_HOSTCONFIG_P1_CONNECT_STATUS;
+	if (omap->port_mode[1] == OMAP_OHCI_PORT_MODE_UNUSED)
+		reg &= ~OMAP_UHH_HOSTCONFIG_P2_CONNECT_STATUS;
+	if (omap->port_mode[2] == OMAP_OHCI_PORT_MODE_UNUSED)
+		reg &= ~OMAP_UHH_HOSTCONFIG_P3_CONNECT_STATUS;
+	 */
+	reg &= ~OMAP_UHH_HOSTCONFIG_P1_CONNECT_STATUS;
+	reg &= ~OMAP_UHH_HOSTCONFIG_P2_CONNECT_STATUS;
+	reg &= ~OMAP_UHH_HOSTCONFIG_P3_CONNECT_STATUS;
+
+	 if (omap->es2_compatibility) {
+		/*
+		 * All OHCI modes need to go through the TLL,
+		 * unlike in the EHCI case. So use UTMI mode
+		 * for all ports for OHCI, on ES2.x silicon
+		 */
+		dev_dbg(omap->dev, "OMAP3 ES version <= ES2.1\n");
+		reg |= OMAP_UHH_HOSTCONFIG_ULPI_BYPASS;
+	} else {
+		dev_dbg(omap->dev, "OMAP3 ES version > ES2.1\n");
+		if (omap->port_mode[0] == OMAP_OHCI_PORT_MODE_UNUSED)
+			reg &= ~OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS;
+		else
+			reg |= OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS;
+
+		if (omap->port_mode[1] == OMAP_OHCI_PORT_MODE_UNUSED)
+			reg &= ~OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS;
+		else
+			reg |= OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS;
+
+		if (omap->port_mode[2] == OMAP_OHCI_PORT_MODE_UNUSED)
+			reg &= ~OMAP_UHH_HOSTCONFIG_ULPI_P3_BYPASS;
+		else
+			reg |= OMAP_UHH_HOSTCONFIG_ULPI_P3_BYPASS;
+
+	}
+	ohci_omap_writel(omap->uhh_base, OMAP_UHH_HOSTCONFIG, reg);
+	dev_dbg(omap->dev, "UHH setup done, uhh_hostconfig=%x\n", reg);
+
+	ohci_omap3_tll_config(omap);
+
+	return 0;
+
+err_sys_status:
+	ohci_omap3_clock_power(omap, 0);
+	clk_put(omap->usbtll_ick);
+
+err_tll_ick:
+	clk_put(omap->usbtll_fck);
+
+err_tll_fck:
+	clk_put(omap->usbhost1_48m_fck);
+
+err_host_48m_fck:
+	clk_put(omap->usbhost2_120m_fck);
+
+err_host_120m_fck:
+	clk_put(omap->usbhost_ick);
+
+err_host_ick:
+	return ret;
+}
+
+static void omap3_stop_ohci(struct ohci_hcd_omap3 *omap, struct usb_hcd *hcd)
+{
+	unsigned long timeout = jiffies + msecs_to_jiffies(100);
+
+	dev_dbg(omap->dev, "stopping TI EHCI USB Controller\n");
+
+	/* Reset USBHOST for insmod/rmmod to work */
+	ohci_omap_writel(omap->uhh_base, OMAP_UHH_SYSCONFIG,
+			OMAP_UHH_SYSCONFIG_SOFTRESET);
+	while (!(ohci_omap_readl(omap->uhh_base, OMAP_UHH_SYSSTATUS)
+				& OMAP_UHH_SYSSTATUS_UHHRESETDONE)) {
+		cpu_relax();
+
+		if (time_after(jiffies, timeout))
+			dev_dbg(omap->dev, "operation timed out\n");
+	}
+
+	while (!(ohci_omap_readl(omap->uhh_base, OMAP_UHH_SYSSTATUS)
+				& OMAP_UHH_SYSSTATUS_OHCIRESETDONE)) {
+		cpu_relax();
+
+		if (time_after(jiffies, timeout))
+			dev_dbg(omap->dev, "operation timed out\n");
+	}
+
+	while (!(ohci_omap_readl(omap->uhh_base, OMAP_UHH_SYSSTATUS)
+				& OMAP_UHH_SYSSTATUS_EHCIRESETDONE)) {
+		cpu_relax();
+
+		if (time_after(jiffies, timeout))
+			dev_dbg(omap->dev, "operation timed out\n");
+	}
+
+	ohci_omap_writel(omap->tll_base, OMAP_USBTLL_SYSCONFIG, (1 << 1));
+
+	while (!(ohci_omap_readl(omap->tll_base, OMAP_USBTLL_SYSSTATUS)
+				& (1 << 0))) {
+		cpu_relax();
+
+		if (time_after(jiffies, timeout))
+			dev_dbg(omap->dev, "operation timed out\n");
+	}
+
+	ohci_omap3_clock_power(omap, 0);
+
+	if (omap->usbtll_fck != NULL) {
+		clk_put(omap->usbtll_fck);
+		omap->usbtll_fck = NULL;
+	}
+
+	if (omap->usbhost_ick != NULL) {
+		clk_put(omap->usbhost_ick);
+		omap->usbhost_ick = NULL;
+	}
+
+	if (omap->usbhost1_48m_fck != NULL) {
+		clk_put(omap->usbhost1_48m_fck);
+		omap->usbhost1_48m_fck = NULL;
+	}
+
+	if (omap->usbhost2_120m_fck != NULL) {
+		clk_put(omap->usbhost2_120m_fck);
+		omap->usbhost2_120m_fck = NULL;
+	}
+
+	if (omap->usbtll_ick != NULL) {
+		clk_put(omap->usbtll_ick);
+		omap->usbtll_ick = NULL;
+	}
+
+	dev_dbg(omap->dev, "Clock to USB host has been disabled\n");
+}
+
+/*-------------------------------------------------------------------------*/
+
+static const struct hc_driver ohci_omap3_hc_driver = {
+	.description =		hcd_name,
+	.product_desc =		"OMAP3 OHCI Host Controller",
+	.hcd_priv_size =	sizeof(struct ohci_hcd),
+
+	/*
+	 * generic hardware linkage
+	 */
+	.irq =			ohci_irq,
+	.flags =		HCD_USB11 | HCD_MEMORY,
+
+	/*
+	 * basic lifecycle operations
+	 */
+	.reset =		ohci_omap3_init,
+	.start =		ohci_omap3_start,
+	.stop =			ohci_stop,
+	.shutdown =		ohci_shutdown,
+
+	/*
+	 * managing i/o requests and associated device resources
+	 */
+	.urb_enqueue =		ohci_urb_enqueue,
+	.urb_dequeue =		ohci_urb_dequeue,
+	.endpoint_disable =	ohci_endpoint_disable,
+
+	/*
+	 * scheduling support
+	 */
+	.get_frame_number =	ohci_get_frame,
+
+	/*
+	 * root hub support
+	 */
+	.hub_status_data =	ohci_hub_status_data,
+	.hub_control =		ohci_hub_control,
+#ifdef	CONFIG_PM
+	.bus_suspend =		ohci_bus_suspend,
+	.bus_resume =		ohci_bus_resume,
+#endif
+	.start_port_reset =	ohci_start_port_reset,
+};
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * configure so an HC device and id are always provided
+ * always called with process context; sleeping is OK
+ */
+
+/**
+ * ohci_hcd_omap3_probe - initialize OMAP-based HCDs
+ *
+ * Allocates basic resources for this USB host controller, and
+ * then invokes the start() method for the HCD associated with it
+ * through the hotplug entry's driver_data.
+ */
+static int __devinit ohci_hcd_omap3_probe(struct platform_device *pdev)
+{
+	struct ohci_hcd_omap_platform_data *pdata = pdev->dev.platform_data;
+	struct ohci_hcd_omap3 *omap;
+	struct resource *res;
+	struct usb_hcd *hcd;
+	int ret = -ENODEV;
+	int irq;
+
+	if (usb_disabled())
+		goto err_disabled;
+
+	if (!pdata) {
+		dev_dbg(&pdev->dev, "missing platform_data\n");
+		goto err_pdata;
+	}
+
+	irq = platform_get_irq(pdev, 0);
+
+	omap = kzalloc(sizeof(*omap), GFP_KERNEL);
+	if (!omap) {
+		ret = -ENOMEM;
+		goto err_disabled;
+	}
+
+	hcd = usb_create_hcd(&ohci_omap3_hc_driver, &pdev->dev,
+			dev_name(&pdev->dev));
+	if (!hcd) {
+		ret = -ENOMEM;
+		goto err_create_hcd;
+	}
+
+	platform_set_drvdata(pdev, omap);
+	omap->dev		= &pdev->dev;
+	omap->port_mode[0]	= pdata->port_mode[0];
+	omap->port_mode[1]	= pdata->port_mode[1];
+	omap->port_mode[2]	= pdata->port_mode[2];
+	omap->es2_compatibility	= pdata->es2_compatibility;
+	omap->ohci		= hcd_to_ohci(hcd);
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+	hcd->rsrc_start = res->start;
+	hcd->rsrc_len = resource_size(res);
+
+	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
+	if (!hcd->regs) {
+		dev_err(&pdev->dev, "OHCI ioremap failed\n");
+		ret = -ENOMEM;
+		goto err_ioremap;
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	omap->uhh_base = ioremap(res->start, resource_size(res));
+	if (!omap->uhh_base) {
+		dev_err(&pdev->dev, "UHH ioremap failed\n");
+		ret = -ENOMEM;
+		goto err_uhh_ioremap;
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
+	omap->tll_base = ioremap(res->start, resource_size(res));
+	if (!omap->tll_base) {
+		dev_err(&pdev->dev, "TLL ioremap failed\n");
+		ret = -ENOMEM;
+		goto err_tll_ioremap;
+	}
+
+	ret = omap3_start_ohci(omap, hcd);
+	if (ret) {
+		dev_dbg(&pdev->dev, "failed to start ehci\n");
+		goto err_start;
+	}
+
+	ohci_hcd_init(omap->ohci);
+
+	ret = usb_add_hcd(hcd, irq, IRQF_DISABLED);
+	if (ret) {
+		dev_dbg(&pdev->dev, "failed to add hcd with err %d\n", ret);
+		goto err_add_hcd;
+	}
+
+	return 0;
+
+err_add_hcd:
+	omap3_stop_ohci(omap, hcd);
+
+err_start:
+	iounmap(omap->tll_base);
+
+err_tll_ioremap:
+	iounmap(omap->uhh_base);
+
+err_uhh_ioremap:
+	iounmap(hcd->regs);
+
+err_ioremap:
+	usb_put_hcd(hcd);
+
+err_create_hcd:
+	kfree(omap);
+err_pdata:
+err_disabled:
+	return ret;
+}
+
+/*
+ * may be called without controller electrically present
+ * may be called with controller, bus, and devices active
+ */
+
+/**
+ * ohci_hcd_omap3_remove - shutdown processing for OHCI HCDs
+ * @pdev: USB Host Controller being removed
+ *
+ * Reverses the effect of ohci_hcd_omap3_probe(), first invoking
+ * the HCD's stop() method.  It is always called from a thread
+ * context, normally "rmmod", "apmd", or something similar.
+ */
+static int __devexit ohci_hcd_omap3_remove(struct platform_device *pdev)
+{
+	struct ohci_hcd_omap3 *omap = platform_get_drvdata(pdev);
+	struct usb_hcd *hcd = ohci_to_hcd(omap->ohci);
+
+	usb_remove_hcd(hcd);
+	omap3_stop_ohci(omap, hcd);
+	iounmap(hcd->regs);
+	iounmap(omap->tll_base);
+	iounmap(omap->uhh_base);
+	usb_put_hcd(hcd);
+	kfree(omap);
+
+	return 0;
+}
+
+static void ohci_hcd_omap3_shutdown(struct platform_device *pdev)
+{
+	struct ohci_hcd_omap3 *omap = platform_get_drvdata(pdev);
+	struct usb_hcd *hcd = ohci_to_hcd(omap->ohci);
+
+	if (hcd->driver->shutdown)
+		hcd->driver->shutdown(hcd);
+}
+
+static struct platform_driver ohci_hcd_omap3_driver = {
+	.probe		= ohci_hcd_omap3_probe,
+	.remove		= __devexit_p(ohci_hcd_omap3_remove),
+	.shutdown	= ohci_hcd_omap3_shutdown,
+	.driver		= {
+		.name	= "ohci-omap3",
+	},
+};
+
+MODULE_ALIAS("platform:ohci-omap3");
+MODULE_AUTHOR("Anand Gadiyar <gadiyar@ti.com>");