path: root/target/linux/gemini/patches-3.8/130-usb-ehci-gemini-fot2gxx-support.patch

--- /dev/null
+++ b/drivers/usb/host/ehci-fotg2xx.c
@@ -0,0 +1,465 @@
+/*
+ *  EHCI Host Controller driver
+ *
+ *  Copyright (C) 2006 Sony Computer Entertainment Inc.
+ *  Copyright 2006 Sony Corp.
+ *
+ *  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; version 2 of the License.
+ */
+
+#include <linux/platform_device.h>
+#include <mach/hardware.h>
+
+#define otg_set(port, bits) writel(readl(hcd->regs + port) | bits, hcd->regs + port)
+
+#define otg_clear(port, bits) writel(readl(hcd->regs + port) & ~bits, hcd->regs + port)
+
+#define GLOBAL_ISR			0xC0
+#define GLOBAL_ICR			0xC4
+
+#define HCD_MISC			0x40
+
+#define OTGC_SCR			0x80
+#define OTGC_INT_EN			0x88
+
+#define GLOBAL_INT_POLARITY		(1 << 3)
+#define GLOBAL_INT_MASK_HC		(1 << 2)
+#define GLOBAL_INT_MASK_OTG		(1 << 1)
+#define GLOBAL_INT_MASK_DEV		(1 << 0)
+
+#define OTGC_SCR_ID			(1 << 21)
+#define OTGC_SCR_CROLE			(1 << 20)
+#define OTGC_SCR_VBUS_VLD		(1 << 19)
+#define OTGC_SCR_A_SRP_RESP_TYPE	(1 << 8)
+#define OTGC_SCR_A_SRP_DET_EN		(1 << 7)
+#define OTGC_SCR_A_SET_B_HNP_EN		(1 << 6)
+#define OTGC_SCR_A_BUS_DROP		(1 << 5)
+#define OTGC_SCR_A_BUS_REQ		(1 << 4)
+
+#define OTGC_INT_APLGRMV		(1 << 12)
+#define OTGC_INT_BPLGRMV		(1 << 11)
+#define OTGC_INT_OVC			(1 << 10)
+#define OTGC_INT_IDCHG			(1 << 9)
+#define OTGC_INT_RLCHG			(1 << 8)
+#define OTGC_INT_AVBUSERR		(1 << 5)
+#define OTGC_INT_ASRPDET		(1 << 4)
+#define OTGC_INT_BSRPDN			(1 << 0)
+
+#define OTGC_INT_A_TYPE		(OTGC_INT_ASRPDET|OTGC_INT_AVBUSERR|OTGC_INT_OVC|OTGC_INT_RLCHG|OTGC_INT_IDCHG|OTGC_INT_APLGRMV)
+#define OTGC_INT_B_TYPE		(OTGC_INT_AVBUSERR|OTGC_INT_OVC|OTGC_INT_RLCHG|OTGC_INT_IDCHG)
+
+static void fotg2xx_otgc_role_change(struct usb_hcd *hcd);
+
+static void fotg2xx_otgc_init(struct usb_hcd *hcd)
+{
+	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+	unsigned int reg;
+
+	reg = __raw_readl(hcd->regs + OTGC_SCR);
+	ehci_info(ehci, "role detected: %s, ",
+		  (reg & OTGC_SCR_CROLE) ? "Peripheral" : "Host");
+
+	if (reg & OTGC_SCR_ID)
+		ehci_info(ehci, "B-Device (may be unsupported!)\n");
+	else
+		ehci_info(ehci, "A-Device\n");
+
+	/* Enable the SRP detect */
+	reg &= ~OTGC_SCR_A_SRP_RESP_TYPE;
+	__raw_writel(reg, hcd->regs + OTGC_SCR);
+
+	reg = __raw_readl(hcd->regs + OTGC_INT_EN);
+	/* clear INT B: bits AVBUSERR | OVC | RLCHG | IDCHG */
+	reg &= ~OTGC_INT_B_TYPE;
+	/* set INT A: bits ASRPDET | AVBUSERR | OVC | RLCHG | IDCHG | APLGRMV */
+	reg |= OTGC_INT_A_TYPE;
+	__raw_writel(reg, hcd->regs + OTGC_INT_EN);
+
+	reg = __raw_readl(hcd->regs + GLOBAL_ICR);
+	reg &= ~GLOBAL_INT_MASK_OTG;
+	__raw_writel(reg, hcd->regs + GLOBAL_ICR);
+
+	/* setup MISC register, fixes timing problems */
+	reg = __raw_readl(hcd->regs + HCD_MISC);
+	reg |= 0xD;
+	__raw_writel(reg, hcd->regs + HCD_MISC);
+
+	fotg2xx_otgc_role_change(hcd);
+}
+
+static void fotg2xx_otgh_close(struct usb_hcd *hcd)
+{
+	unsigned int reg;
+
+	/* <1>.Enable Interrupt Mask */
+	reg = __raw_readl(hcd->regs + GLOBAL_ICR);
+	reg |= GLOBAL_INT_MASK_HC;
+	__raw_writel(reg, hcd->regs + GLOBAL_ICR);
+
+	/* <2>.Clear the Interrupt status */
+	reg = __raw_readl(hcd->regs + 0x18);
+	reg &= 0x0000003F;
+	__raw_writel(reg, hcd->regs + 0x14);
+}
+
+static void fotg2xx_otgh_open(struct usb_hcd *hcd)
+{
+	unsigned int reg;
+
+	reg = __raw_readl(hcd->regs + OTGC_SCR);
+	reg &= ~OTGC_SCR_A_SRP_DET_EN;
+	__raw_writel(reg, hcd->regs + OTGC_SCR);
+
+	reg = __raw_readl(hcd->regs + GLOBAL_ICR);
+	reg &= ~GLOBAL_INT_MASK_HC;
+	__raw_writel(reg, hcd->regs + GLOBAL_ICR);
+}
+
+/* change to host role */
+static void fotg2xx_otgc_role_change(struct usb_hcd *hcd)
+{
+
+	/* clear A_SET_B_HNP_EN */
+	otg_clear(0x80, BIT(6));
+
+	/*** Enable VBUS driving */
+	if (readl(hcd->regs + 0x80) & BIT(19))
+		printk(KERN_INFO "VBUS already enabled\n");
+	else {
+		int cnt = 0;
+
+		/* clear A_BUS_DROP */
+		otg_clear(0x80, BIT(5));
+
+		/* set A_BUS_REQ */
+		otg_set(0x80, BIT(4));
+
+		/* set global bus reg to VBUS on */
+		writel(readl(IO_ADDRESS(0x40000000) + 0x30) | ((BIT(21)|BIT(22))),
+			IO_ADDRESS(0x40000000) + 0x30);
+
+		if (readl(hcd->regs + 0x80) & (1<<19)) {
+			printk(KERN_INFO "Waiting for VBus");
+			while (!(readl(hcd->regs + 0x80) & (1<<19)) && (cnt < 80)) {
+				printk(KERN_CONT ".");
+				cnt++;
+			}
+			printk(KERN_CONT "\n");
+		} else
+			printk(KERN_INFO "VBUS enabled.\n");
+
+		mdelay(1);
+	}
+	fotg2xx_otgh_open(hcd);
+}
+
+static int fotg2xx_ehci_hc_reset(struct usb_hcd *hcd)
+{
+	int result;
+	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+
+	ehci->caps = hcd->regs;
+	ehci->regs = hcd->regs + HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
+
+	dbg_hcs_params(ehci, "reset");
+	dbg_hcc_params(ehci, "reset");
+
+	ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
+	hcd->has_tt = 1;
+
+	result = ehci_halt(ehci);
+	if (result)
+		return result;
+
+	result = ehci_init(hcd);
+	if (result)
+		return result;
+
+	ehci_port_power(ehci, 0);
+
+	return result;
+}
+
+/*
+ * Name: OTGC_INT_ISR
+ * Description:This interrupt service routine belongs to the OTG-Controller
+ *           <1>.Check for ID_Change
+ *           <2>.Check for RL_Change
+ *           <3>.Error Detect
+ * Input: wINTStatus
+ * Output:void
+ */
+void fotg2xx_int_isr(struct usb_hcd *hcd, u32 wINTStatus)
+{
+	/* <1>.Check for ID_Change */
+	if (wINTStatus&OTGC_INT_IDCHG) {
+		if ((readl(hcd->regs + 0x80) & BIT(21)) != 0)
+			fotg2xx_otgc_init(hcd); /* Change to B Type */
+		else
+			fotg2xx_otgc_init(hcd); /* Change to A Type */
+
+		return;
+	}
+
+	/* <2>.Check for RL_Change */
+	if (wINTStatus&OTGC_INT_RLCHG)
+		fotg2xx_otgc_role_change(hcd);
+
+	/* <3>.Error Detect */
+	if (wINTStatus&OTGC_INT_AVBUSERR)
+		printk(KERN_ERR "VBus error!\n");
+
+	if (wINTStatus&OTGC_INT_OVC)
+		printk(KERN_WARNING "Overcurrent detected!\n");
+
+	/* <3>.Check for Type-A/Type-B Interrupt */
+	if ((readl(hcd->regs + 0x80) & BIT(21)) == 0) { /*For Type-A Interrupt*/
+		if (wINTStatus & (OTGC_INT_A_TYPE | OTGC_INT_ASRPDET)) {
+			/* <1>.SRP detected => then set global variable */
+			printk(KERN_WARNING "SRP detected, but not implemented!\n");
+
+#if 0
+			u32 wTempCounter;
+			/* <2>.Turn on the V Bus */
+			pFTC_OTG->otg.state = OTG_STATE_A_WAIT_VRISE;
+			OTGC_enable_vbus_draw_storlink(1);
+			pFTC_OTG->otg.state = OTG_STATE_A_HOST;
+			/* <3>.Should waiting for Device-Connect Wait 300ms */
+			INFO(pFTC_OTG, ">>> OTG-A Waiting for OTG-B Connect,\n");
+			wTempCounter = 0;
+			while (mwHost20_PORTSC_ConnectStatus_Rd() == 0) {
+				mdelay(1);
+				wTempCounter++;
+				/* Waiting for 300 ms */
+				if (wTempCounter > 300) {
+					mdwOTGC_Control_A_SRP_DET_EN_Clr();
+					INFO(pFTC_OTG, ">>> OTG-B do not connect under 300 ms...\n");
+					break;
+				}
+			}
+			/* <4>.If Connect => issue quick Reset */
+			if (mwHost20_PORTSC_ConnectStatus_Rd() > 0) {
+				mdelay(300); /* For OPT-A Test */
+				OTGH_host_quick_Reset();
+				OTGH_Open();
+				pFTC_OTG->otg.host->A_Disable_Set_Feature_HNP = 0;
+			}
+#endif
+		}
+	} else { /* For Type-B Interrupt */
+		BUG();
+	}
+}
+
+static irqreturn_t fotg2xx_ehci_irq(int irq, void *devid)
+{
+	struct usb_hcd *hcd = devid;
+	u32 val;
+
+	/* OTG Interrupt Status Register */
+	val = readl(hcd->regs + 0x84);
+
+	/* OTG stuff */
+	if (val) {
+		/* supposed to do "INT STS Clr" - XXX */
+		writel(readl(hcd->regs + 0x84) | val, hcd->regs + 0x84);
+
+		fotg2xx_int_isr(hcd, val);
+
+		/* supposed to do "INT STS Clr" - XXX */
+		writel(readl(hcd->regs + 0x84) | val, hcd->regs + 0x84);
+
+		return IRQ_HANDLED;
+	}
+
+	if ((readl(hcd->regs + 0x80) & BIT(20)) == 0) { /* Role is HOST */
+		if (readl(hcd->regs + 0xC0) & BIT(2)) { /* INT STS HOST */
+			/* leave this for ehci irq handler */
+			return IRQ_NONE;
+		}
+	} else
+		printk(KERN_WARNING
+		      "received irq for peripheral - don't know what to do!\n");
+
+	/* do not call the ehci irq handler */
+	return IRQ_HANDLED;
+}
+
+static int fotg2xx_ehci_run(struct usb_hcd *hcd)
+{
+	int retval;
+
+	retval = ehci_run(hcd);
+
+	fotg2xx_otgh_close(hcd);
+	fotg2xx_otgc_init(hcd);
+
+	return retval;
+}
+
+static const struct hc_driver fotg2xx_ehci_hc_driver = {
+	.description		= hcd_name,
+	.product_desc		= "FOTG2XX EHCI Host Controller",
+	.hcd_priv_size		= sizeof(struct ehci_hcd),
+	.irq			= ehci_irq,
+	.flags			= HCD_MEMORY | HCD_USB2,
+	.reset			= fotg2xx_ehci_hc_reset,
+	.start			= fotg2xx_ehci_run,
+	.stop			= ehci_stop,
+	.shutdown		= ehci_shutdown,
+
+	.urb_enqueue		= ehci_urb_enqueue,
+	.urb_dequeue		= ehci_urb_dequeue,
+	.endpoint_disable	= ehci_endpoint_disable,
+	.endpoint_reset		= ehci_endpoint_reset,
+
+	.get_frame_number	= ehci_get_frame,
+
+	.hub_status_data	= ehci_hub_status_data,
+	.hub_control		= ehci_hub_control,
+#if defined(CONFIG_PM)
+	.bus_suspend		= ehci_bus_suspend,
+	.bus_resume		= ehci_bus_resume,
+#endif
+	.relinquish_port	= ehci_relinquish_port,
+	.port_handed_over	= ehci_port_handed_over,
+
+	.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
+};
+
+static int fotg2xx_ehci_probe(struct platform_device *pdev)
+{
+	const struct hc_driver *driver = &fotg2xx_ehci_hc_driver;
+	struct usb_hcd *hcd;
+	struct resource *res;
+	int irq;
+	int retval;
+
+	pr_debug("initializing FOTG2XX-SOC USB Controller\n");
+
+	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+	if (!res) {
+		dev_err(&pdev->dev,
+			"Found HC with no IRQ. Check %s setup!\n",
+			dev_name(&pdev->dev));
+		return -ENODEV;
+	}
+
+	irq = res->start;
+
+	hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
+	if (!hcd) {
+		retval = -ENOMEM;
+		goto err1;
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		dev_err(&pdev->dev,
+			"Found HC with no register addr. Check %s setup!\n",
+			dev_name(&pdev->dev));
+		retval = -ENODEV;
+		goto err2;
+	}
+
+	hcd->rsrc_start = res->start;
+	hcd->rsrc_len = res->end - res->start + 1;
+	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
+				driver->description)) {
+		dev_dbg(&pdev->dev, "controller already in use\n");
+		retval = -EBUSY;
+		goto err2;
+	}
+
+	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
+	if (hcd->regs == NULL) {
+		dev_dbg(&pdev->dev, "error mapping memory\n");
+		retval = -EFAULT;
+		goto err3;
+	}
+
+
+	/* set global reg to mini-A host */
+	writel(readl(IO_ADDRESS(0x40000000) + 0x30) & ~(BIT(30)|BIT(29)),
+		IO_ADDRESS(0x40000000) + 0x30);
+
+	/* USB0&USB1 - VBUS off */
+	writel(readl(IO_ADDRESS(0x40000000) + 0x30) & ~(BIT(21)|BIT(22)),
+		IO_ADDRESS(0x40000000) + 0x30);
+
+	if ((readl(hcd->regs) == 0x01000010) &&
+		(readl(hcd->regs + 4) == 0x00000001) &&
+		(readl(hcd->regs + 8) == 0x00000006)) {
+		dev_info(&pdev->dev,
+			"Found Faraday OTG 2XX controller (base = 0x%08lX)\n",
+			(unsigned long) hcd->rsrc_start);
+	} else {
+		dev_err(&pdev->dev, "fotg2xx id mismatch: found %d.%d.%d\n",
+			readl(hcd->regs + 0x00),
+			readl(hcd->regs + 0x04),
+			readl(hcd->regs + 0x08));
+		retval = -ENODEV;
+		goto err4;
+	}
+
+	platform_set_drvdata(pdev, hcd);
+
+	/* mask interrupts - peripheral, otg, host, hi-active (bits 0,1,2,3) */
+	otg_set(0xc4, BIT(3)); /* hi active */
+
+	otg_set(0xc4, BIT(2)); /* host */
+	otg_set(0xc4, BIT(1)); /* otg */
+	otg_set(0xc4, BIT(0)); /* peripheral */
+
+	/* register additional interrupt - here we check otg status */
+	if ((request_irq(irq, &fotg2xx_ehci_irq, IRQF_SHARED | IRQF_DISABLED,
+		hcd->irq_descr, hcd)) != 0) {
+		dev_dbg(&pdev->dev, "error requesting irq %d\n", irq);
+		retval = -EFAULT;
+		goto err4;
+	}
+
+	retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
+	if (retval != 0)
+		goto err4;
+	return retval;
+
+err4:
+	iounmap(hcd->regs);
+err3:
+	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+err2:
+	usb_put_hcd(hcd);
+err1:
+	dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), retval);
+	return retval;
+}
+
+/* may be called without controller electrically present */
+/* may be called with controller, bus, and devices active */
+
+int fotg2xx_ehci_remove(struct platform_device *pdev)
+{
+	struct usb_hcd *hcd =
+		(struct usb_hcd *)platform_get_drvdata(pdev);
+
+	usb_remove_hcd(hcd);
+	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+	iounmap(hcd->regs);
+	usb_put_hcd(hcd);
+	platform_set_drvdata(pdev, NULL);
+
+	return 0;
+}
+
+MODULE_ALIAS("platform:ehci-fotg2xx");
+
+static struct platform_driver fotg2xx_ehci_driver = {
+	.probe = fotg2xx_ehci_probe,
+	.remove = fotg2xx_ehci_remove,
+	.driver = {
+		.name = "ehci-fotg2xx",
+	},
+};
--- a/drivers/usb/host/ehci.h
+++ b/drivers/usb/host/ehci.h
@@ -600,7 +600,12 @@ static inline unsigned int
 ehci_port_speed(struct ehci_hcd *ehci, unsigned int portsc)
 {
 	if (ehci_is_TDI(ehci)) {
+#ifdef CONFIG_ARCH_GEMINI
+		portsc = readl(ehci_to_hcd(ehci)->regs + 0x80);
+		switch ((portsc>>22)&3) {
+#else
 		switch ((portsc >> (ehci->has_hostpc ? 25 : 26)) & 3) {
+#endif
 		case 0:
 			return 0;
 		case 1:
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -204,10 +204,12 @@ static int ehci_halt (struct ehci_hcd *e
 	 * This routine gets called during probe before ehci->command
 	 * has been initialized, so we can't rely on its value.
 	 */
+#ifndef CONFIG_ARCH_GEMINI
 	ehci->command &= ~CMD_RUN;
 	temp = ehci_readl(ehci, &ehci->regs->command);
 	temp &= ~(CMD_RUN | CMD_IAAD);
 	ehci_writel(ehci, temp, &ehci->regs->command);
+#endif
 
 	spin_unlock_irq(&ehci->lock);
 	synchronize_irq(ehci_to_hcd(ehci)->irq);
@@ -257,13 +259,17 @@ static int ehci_reset (struct ehci_hcd *
 	if (ehci->has_hostpc) {
 		ehci_writel(ehci, USBMODE_EX_HC | USBMODE_EX_VBPS,
 				&ehci->regs->usbmode_ex);
+#ifndef CONFIG_ARCH_GEMINI
 		ehci_writel(ehci, TXFIFO_DEFAULT, &ehci->regs->txfill_tuning);
+#endif
 	}
 	if (retval)
 		return retval;
 
+#ifndef CONFIG_ARCH_GEMINI
 	if (ehci_is_TDI(ehci))
 		tdi_reset (ehci);
+#endif
 
 	if (ehci->debug)
 		dbgp_external_startup(ehci_to_hcd(ehci));
@@ -340,11 +346,14 @@ static void ehci_silence_controller(stru
 	ehci->rh_state = EHCI_RH_HALTED;
 	ehci_turn_off_all_ports(ehci);
 
+#ifndef CONFIG_ARCH_GEMINI
 	/* make BIOS/etc use companion controller during reboot */
 	ehci_writel(ehci, 0, &ehci->regs->configured_flag);
 
 	/* unblock posted writes */
 	ehci_readl(ehci, &ehci->regs->configured_flag);
+#endif
+
 	spin_unlock_irq(&ehci->lock);
 }
 
@@ -599,7 +608,9 @@ static int ehci_run (struct usb_hcd *hcd
 	// Philips, Intel, and maybe others need CMD_RUN before the
 	// root hub will detect new devices (why?); NEC doesn't
 	ehci->command &= ~(CMD_LRESET|CMD_IAAD|CMD_PSE|CMD_ASE|CMD_RESET);
+#ifndef CONFIG_ARCH_GEMINI
 	ehci->command |= CMD_RUN;
+#endif
 	ehci_writel(ehci, ehci->command, &ehci->regs->command);
 	dbg_cmd (ehci, "init", ehci->command);
 
@@ -619,9 +630,11 @@ static int ehci_run (struct usb_hcd *hcd
 	 */
 	down_write(&ehci_cf_port_reset_rwsem);
 	ehci->rh_state = EHCI_RH_RUNNING;
+#ifndef CONFIG_ARCH_GEMINI
 	ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag);
 	ehci_readl(ehci, &ehci->regs->command);	/* unblock posted writes */
 	msleep(5);
+#endif /* !CONFIG_ARCH_GEMINI */
 	up_write(&ehci_cf_port_reset_rwsem);
 	ehci->last_periodic_enable = ktime_get_real();
 
@@ -1242,6 +1255,11 @@ MODULE_DESCRIPTION(DRIVER_DESC);
 MODULE_AUTHOR (DRIVER_AUTHOR);
 MODULE_LICENSE ("GPL");
 
+#ifdef CONFIG_ARCH_GEMINI
+#include "ehci-fotg2xx.c"
+#define PLATFORM_DRIVER		fotg2xx_ehci_driver
+#endif
+
 #ifdef CONFIG_USB_EHCI_FSL
 #include "ehci-fsl.c"
 #define	PLATFORM_DRIVER		ehci_fsl_driver
--- a/drivers/usb/host/ehci-hub.c
+++ b/drivers/usb/host/ehci-hub.c
@@ -912,6 +912,12 @@ static int ehci_hub_control (
 			/* see what we found out */
 			temp = check_reset_complete (ehci, wIndex, status_reg,
 					ehci_readl(ehci, status_reg));
+#ifdef CONFIG_ARCH_GEMINI
+			/* restart schedule */
+			ehci_writel(ehci, ehci_readl(ehci, &ehci->regs->command) | CMD_RUN, &ehci->regs->command);
+
+//			hcd->state = HC_STATE_RUNNING;
+#endif
 		}
 
 		if (!(temp & (PORT_RESUME|PORT_RESET))) {
--- a/drivers/usb/Kconfig
+++ b/drivers/usb/Kconfig
@@ -47,6 +47,7 @@ config USB_ARCH_HAS_EHCI
 	default y if MICROBLAZE
 	default y if SPARC_LEON
 	default y if ARCH_MMP
+	default y if ARCH_GEMINI
 	default y if MACH_LOONGSON1
 	default y if PLAT_ORION
 	default PCI
@@ -96,7 +97,7 @@ config USB
 	  traditional PC serial port.  The bus supplies power to peripherals
 	  and allows for hot swapping.  Up to 127 USB peripherals can be
 	  connected to a single USB host in a tree structure.
-	  
+
 	  The USB host is the root of the tree, the peripherals are the
 	  leaves and the inner nodes are special USB devices called hubs.
 	  Most PCs now have USB host ports, used to connect peripherals
--- a/include/linux/usb/ehci_def.h
+++ b/include/linux/usb/ehci_def.h
@@ -111,6 +111,7 @@ struct ehci_regs {
 	/* ASYNCLISTADDR: offset 0x18 */
 	u32		async_next;	/* address of next async queue head */
 
+#ifndef CONFIG_ARCH_GEMINI
 	u32		reserved1[2];
 
 	/* TXFILLTUNING: offset 0x24 */
@@ -118,6 +119,7 @@ struct ehci_regs {
 #define TXFIFO_DEFAULT	(8<<16)		/* FIFO burst threshold 8 */
 
 	u32		reserved2[6];
+#endif /* !CONFIG_ARCH_GEMINI */
 
 	/* CONFIGFLAG: offset 0x40 */
 	u32		configured_flag;