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Commit 938fbe54 authored by Heiko Stübner's avatar Heiko Stübner Committed by Greg Kroah-Hartman
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s3c-hsudc: Add basic otg transceiver handling 



Makes it possible to use i.e. gpio-vbus to handle vbus events.

Signed-off-by: default avatarHeiko Stuebner <heiko@sntech.de>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent da4fc14c

drivers/usb/gadget/s3c-hsudc.c

+23 −0
Original line number Diff line number Diff line
@@ -26,6 +26,7 @@ 
#include <linux/clk.h>

#include <linux/usb/ch9.h>

#include <linux/usb/gadget.h>

#include <linux/usb/otg.h>

#include <linux/prefetch.h>



#include <mach/regs-s3c2443-clock.h>
@@ -137,6 +138,7 @@ struct s3c_hsudc { 
	struct usb_gadget_driver *driver;

	struct device *dev;

	struct s3c24xx_hsudc_platdata *pd;

	struct otg_transceiver *transceiver;

	spinlock_t lock;

	void __iomem *regs;

	struct resource *mem_rsrc;
@@ -1171,6 +1173,22 @@ static int s3c_hsudc_start(struct usb_gadget_driver *driver, 
		return ret;

	}



	/* connect to bus through transceiver */

	if (hsudc->transceiver) {

		ret = otg_set_peripheral(hsudc->transceiver, &hsudc->gadget);

		if (ret) {

			dev_err(hsudc->dev, "%s: can't bind to transceiver\n",

					hsudc->gadget.name);

			driver->unbind(&hsudc->gadget);



			device_del(&hsudc->gadget.dev);



			hsudc->driver = NULL;

			hsudc->gadget.dev.driver = NULL;

			return ret;

		}

	}



	enable_irq(hsudc->irq);

	dev_info(hsudc->dev, "bound driver %s\n", driver->driver.name);
@@ -1201,6 +1219,9 @@ static int s3c_hsudc_stop(struct usb_gadget_driver *driver) 
	s3c_hsudc_stop_activity(hsudc, driver);

	spin_unlock_irqrestore(&hsudc->lock, flags);



	if (hsudc->transceiver)

		(void) otg_set_peripheral(hsudc->transceiver, NULL);



	driver->unbind(&hsudc->gadget);

	device_del(&hsudc->gadget.dev);

	disable_irq(hsudc->irq);
@@ -1247,6 +1268,8 @@ static int s3c_hsudc_probe(struct platform_device *pdev) 
	hsudc->dev = dev;

	hsudc->pd = pdev->dev.platform_data;



	hsudc->transceiver = otg_get_transceiver();



	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	if (!res) {

		dev_err(dev, "unable to obtain driver resource data\n");