HACK: Revert "USB: extend ehci-fsl and fsl_udc_core driver for OTG operation"

This reverts commit 83722bc9430424de1614ff31696f73a40b3d81a9.

Our OTG support doesn't play nice with the upstreamed OTG support, so
for now, revert the upstream commit.

Conflicts:

	drivers/usb/gadget/fsl_udc_core.c

Signed-off-by: Dan Willemsen <dwillemsen@nvidia.com>

Rebase-Id: R5a4b466ee983307ee277a591e664c854b0ddd970

2 files changed, 16 insertions, 134 deletions

diff --git a/drivers/usb/gadget/fsl_udc_core.c b/drivers/usb/gadget/fsl_udc_core.c
index 4c1657a8505e..66bcef636096 100644
--- a/drivers/usb/gadget/fsl_udc_core.c
+++ b/drivers/usb/gadget/fsl_udc_core.c
@@ -492,19 +492,6 @@ static void dr_controller_stop(struct fsl_udc *udc)
 {
 	unsigned int tmp;
 
-	pr_debug("%s\n", __func__);
-
-	/* if we're in OTG mode, and the Host is currently using the port,
-	 * stop now and don't rip the controller out from under the
-	 * ehci driver
-	 */
-	if (udc->gadget.is_otg) {
-		if (!(fsl_readl(&dr_regs->otgsc) & OTGSC_STS_USB_ID)) {
-			pr_debug("udc: Leaving early\n");
-			return;
-		}
-	}
-
 	/* Clear pending interrupt status bits */
 	tmp = fsl_readl(&dr_regs->usbsts);
 	fsl_writel(tmp, &dr_regs->usbsts);
@@ -2086,9 +2073,6 @@ static void port_change_irq(struct fsl_udc *udc)
 {
 	u32 speed;
 
-	if (udc->bus_reset)
-		udc->bus_reset = 0;
-
 	/* Bus resetting is finished */
 	if (!(fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET)) {
 		/* Get the speed */
@@ -2206,8 +2190,6 @@ static void reset_irq(struct fsl_udc *udc)
 #else
 	if (fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET) {
 		VDBG("Bus reset");
-		/* Bus is reseting */
-		udc->bus_reset = 1;
 		/* Reset all the queues, include XD, dTD, EP queue
 		 * head and TR Queue */
 		reset_queues(udc);
@@ -2354,7 +2336,6 @@ static irqreturn_t fsl_udc_irq(int irq, void *_udc)
 
 	/* Reset Received */
 	if (irq_src & USB_STS_RESET) {
-		VDBG("reset int");
 		reset_irq(udc);
 		status = IRQ_HANDLED;
 	}
@@ -2412,30 +2393,11 @@ static int fsl_start(struct usb_gadget_driver *driver,
 		goto out;
 	}
 
-	if (udc_controller->transceiver) {
-		/* Suspend the controller until OTG enable it */
-		udc_controller->stopped = 1;
-		printk(KERN_INFO "Suspend udc for OTG auto detect\n");
-
-		/* connect to bus through transceiver */
-		if (udc_controller->transceiver) {
-			retval = otg_set_peripheral(udc_controller->transceiver,
-						    &udc_controller->gadget);
-			if (retval < 0) {
-				ERR("can't bind to transceiver\n");
-				driver->unbind(&udc_controller->gadget);
-				udc_controller->gadget.dev.driver = 0;
-				udc_controller->driver = 0;
-				return retval;
-			}
-		}
-	} else {
-		/* Enable DR IRQ reg and set USBCMD reg Run bit */
-		dr_controller_run(udc_controller);
-		udc_controller->usb_state = USB_STATE_ATTACHED;
-		udc_controller->ep0_state = WAIT_FOR_SETUP;
-		udc_controller->ep0_dir = 0;
-	}
+	/* Enable DR IRQ reg and Set usbcmd reg  Run bit */
+	dr_controller_run(udc_controller);
+	udc_controller->usb_state = USB_STATE_ATTACHED;
+	udc_controller->ep0_state = WAIT_FOR_SETUP;
+	udc_controller->ep0_dir = 0;
 	printk(KERN_INFO "%s: bind to driver %s\n",
 			udc_controller->gadget.name, driver->driver.name);
 
@@ -2914,30 +2876,17 @@ static int __init fsl_udc_probe(struct platform_device *pdev)
 	spin_lock_init(&udc_controller->lock);
 	udc_controller->stopped = 1;
 
-#ifdef CONFIG_USB_OTG
-	if (pdata->operating_mode == FSL_USB2_DR_OTG) {
-		udc_controller->transceiver = otg_get_transceiver();
-		if (!udc_controller->transceiver) {
-			ERR("Can't find OTG driver!\n");
-			ret = -ENODEV;
-			goto err_kfree;
-		}
-	}
-#endif
-
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!res) {
 		ret = -ENXIO;
 		goto err_kfree;
 	}
 
-	if (pdata->operating_mode == FSL_USB2_DR_DEVICE) {
-		if (!request_mem_region(res->start, resource_size(res),
-					driver_name)) {
-			ERR("request mem region for %s failed\n", pdev->name);
-			ret = -EBUSY;
-			goto err_kfree;
-		}
+	if (!request_mem_region(res->start, resource_size(res),
+				driver_name)) {
+		ERR("request mem region for %s failed\n", pdev->name);
+		ret = -EBUSY;
+		goto err_kfree;
 	}
 
 	dr_regs = ioremap(res->start, resource_size(res));
@@ -3021,11 +2970,9 @@ static int __init fsl_udc_probe(struct platform_device *pdev)
 		goto err_free_irq;
 	}
 
-	if (!udc_controller->transceiver) {
-		/* initialize usb hw reg except for regs for EP,
-		 * leave usbintr reg untouched */
-		dr_controller_setup(udc_controller);
-	}
+	/* initialize usb hw reg except for regs for EP,
+	 * leave usbintr reg untouched */
+	dr_controller_setup(udc_controller);
 
 	fsl_udc_clk_finalize(pdev);
 
@@ -3045,9 +2992,6 @@ static int __init fsl_udc_probe(struct platform_device *pdev)
 	if (ret < 0)
 		goto err_free_irq;
 
-	if (udc_controller->transceiver)
-		udc_controller->gadget.is_otg = 1;
-
 	/* setup QH and epctrl for ep0 */
 	ep0_setup(udc_controller);
 
@@ -3090,6 +3034,7 @@ static int __init fsl_udc_probe(struct platform_device *pdev)
 	INIT_WORK(&udc_controller->charger_work, fsl_udc_set_current_limit_work);
 
 #ifdef CONFIG_USB_OTG_UTILS
+	udc_controller->transceiver = otg_get_transceiver();
 	if (udc_controller->transceiver) {
 		dr_controller_stop(udc_controller);
 		dr_controller_reset(udc_controller);
@@ -3133,8 +3078,7 @@ err_iounmap:
 err_iounmap_noclk:
 	iounmap(dr_regs);
 err_release_mem_region:
-	if (pdata->operating_mode == FSL_USB2_DR_DEVICE)
-		release_mem_region(res->start, resource_size(res));
+	release_mem_region(res->start, resource_size(res));
 err_kfree:
 	kfree(udc_controller);
 	udc_controller = NULL;
@@ -3177,8 +3121,7 @@ static int __exit fsl_udc_remove(struct platform_device *pdev)
 	dma_pool_destroy(udc_controller->td_pool);
 	free_irq(udc_controller->irq, udc_controller);
 	iounmap(dr_regs);
-	if (pdata->operating_mode == FSL_USB2_DR_DEVICE)
-		release_mem_region(res->start, resource_size(res));
+	release_mem_region(res->start, resource_size(res));
 
 	device_unregister(&udc_controller->gadget.dev);
 	/* free udc --wait for the release() finished */
@@ -3269,62 +3212,6 @@ static int fsl_udc_resume(struct platform_device *pdev)
 	return 0;
 }
 
-static int fsl_udc_otg_suspend(struct device *dev, pm_message_t state)
-{
-	struct fsl_udc *udc = udc_controller;
-	u32 mode, usbcmd;
-
-	mode = fsl_readl(&dr_regs->usbmode) & USB_MODE_CTRL_MODE_MASK;
-
-	pr_debug("%s(): mode 0x%x stopped %d\n", __func__, mode, udc->stopped);
-
-	/*
-	 * If the controller is already stopped, then this must be a
-	 * PM suspend.  Remember this fact, so that we will leave the
-	 * controller stopped at PM resume time.
-	 */
-	if (udc->stopped) {
-		pr_debug("gadget already stopped, leaving early\n");
-		udc->already_stopped = 1;
-		return 0;
-	}
-
-	if (mode != USB_MODE_CTRL_MODE_DEVICE) {
-		pr_debug("gadget not in device mode, leaving early\n");
-		return 0;
-	}
-
-	/* stop the controller */
-	usbcmd = fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP;
-	fsl_writel(usbcmd, &dr_regs->usbcmd);
-
-	udc->stopped = 1;
-
-	pr_info("USB Gadget suspended\n");
-
-	return 0;
-}
-
-static int fsl_udc_otg_resume(struct device *dev)
-{
-	pr_debug("%s(): stopped %d  already_stopped %d\n", __func__,
-		 udc_controller->stopped, udc_controller->already_stopped);
-
-	/*
-	 * If the controller was stopped at suspend time, then
-	 * don't resume it now.
-	 */
-	if (udc_controller->already_stopped) {
-		udc_controller->already_stopped = 0;
-		pr_debug("gadget was already stopped, leaving early\n");
-		return 0;
-	}
-
-	pr_info("USB Gadget resume\n");
-
-	return fsl_udc_resume(NULL);
-}
-
 /*-------------------------------------------------------------------------
 	Register entry point for the peripheral controller driver
 --------------------------------------------------------------------------*/
@@ -3337,9 +3224,6 @@ static struct platform_driver udc_driver = {
 	.driver  = {
 		.name = (char *)driver_name,
 		.owner = THIS_MODULE,
-		/* udc suspend/resume called from OTG driver */
-		.suspend = fsl_udc_otg_suspend,
-		.resume  = fsl_udc_otg_resume,
 	},
 };
 
diff --git a/drivers/usb/gadget/fsl_usb2_udc.h b/drivers/usb/gadget/fsl_usb2_udc.h
index 9bcf8e5bc236..0386be60ff79 100644
--- a/drivers/usb/gadget/fsl_usb2_udc.h
+++ b/drivers/usb/gadget/fsl_usb2_udc.h
@@ -619,7 +619,6 @@ struct fsl_udc {
 	unsigned vbus_active:1;
 	unsigned stopped:1;
 	unsigned remote_wakeup:1;
-	unsigned already_stopped:1;
 	unsigned big_endian_desc:1;
 
 	struct ep_queue_head *ep_qh;	/* Endpoints Queue-Head */
@@ -631,7 +630,6 @@ struct fsl_udc {
 	dma_addr_t ep_qh_dma;		/* dma address of QH */
 
 	u32 max_pipes;          /* Device max pipes */
-	u32 bus_reset;		/* Device is bus resetting */
 	u32 resume_state;	/* USB state to resume */
 	u32 usb_state;		/* USB current state */
 	u32 ep0_state;		/* Endpoint zero state */