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Commit d7be2952 authored by Felipe Balbi's avatar Felipe Balbi
Browse files

usb: dwc3: gadget: re-factor ->udc_start and ->udc_stop 



we will be re-using it for suspend/resume, so
instead of duplicating code, let's just re-factor
the functions so they can be re-used.

Signed-off-by: default avatarFelipe Balbi <felipe.balbi@linux.intel.com>
parent 5185c913

drivers/usb/dwc3/gadget.c

+49 −41
Original line number Diff line number Diff line
@@ -1616,37 +1616,12 @@ static void dwc3_gadget_disable_irq(struct dwc3 *dwc) 
static irqreturn_t dwc3_interrupt(int irq, void *_dwc);

static irqreturn_t dwc3_thread_interrupt(int irq, void *_dwc);



static int dwc3_gadget_start(struct usb_gadget *g,

		struct usb_gadget_driver *driver)

static int __dwc3_gadget_start(struct dwc3 *dwc)

{

	struct dwc3		*dwc = gadget_to_dwc(g);

	struct dwc3_ep		*dep;

	unsigned long		flags;

	int			ret = 0;

	int			irq;

	u32			reg;



	irq = platform_get_irq(to_platform_device(dwc->dev), 0);

	ret = request_threaded_irq(irq, dwc3_interrupt, dwc3_thread_interrupt,

			IRQF_SHARED, "dwc3", dwc->ev_buf);

	if (ret) {

		dev_err(dwc->dev, "failed to request irq #%d --> %d\n",

				irq, ret);

		goto err0;

	}



	spin_lock_irqsave(&dwc->lock, flags);



	if (dwc->gadget_driver) {

		dev_err(dwc->dev, "%s is already bound to %s\n",

				dwc->gadget.name,

				dwc->gadget_driver->driver.name);

		ret = -EBUSY;

		goto err1;

	}



	dwc->gadget_driver	= driver;



	reg = dwc3_readl(dwc->regs, DWC3_DCFG);

	reg &= ~(DWC3_DCFG_SPEED_MASK);
@@ -1709,7 +1684,7 @@ static int dwc3_gadget_start(struct usb_gadget *g, 
			false);

	if (ret) {

		dev_err(dwc->dev, "failed to enable %s\n", dep->name);

		goto err2;

		goto err0;

	}



	dep = dwc->eps[1];
@@ -1717,7 +1692,7 @@ static int dwc3_gadget_start(struct usb_gadget *g, 
			false);

	if (ret) {

		dev_err(dwc->dev, "failed to enable %s\n", dep->name);

		goto err3;

		goto err1;

	}



	/* begin to receive SETUP packets */
@@ -1726,39 +1701,72 @@ static int dwc3_gadget_start(struct usb_gadget *g, 


	dwc3_gadget_enable_irq(dwc);



	spin_unlock_irqrestore(&dwc->lock, flags);



	return 0;



err3:

	__dwc3_gadget_ep_disable(dwc->eps[0]);



err2:

	dwc->gadget_driver = NULL;



err1:

	spin_unlock_irqrestore(&dwc->lock, flags);



	free_irq(irq, dwc->ev_buf);

	__dwc3_gadget_ep_disable(dwc->eps[0]);



err0:

	return ret;

}



static int dwc3_gadget_stop(struct usb_gadget *g)

static int dwc3_gadget_start(struct usb_gadget *g,

		struct usb_gadget_driver *driver)

{

	struct dwc3		*dwc = gadget_to_dwc(g);

	unsigned long		flags;

	int			ret = 0;

	int			irq;



	irq = platform_get_irq(to_platform_device(dwc->dev), 0);

	ret = request_threaded_irq(irq, dwc3_interrupt, dwc3_thread_interrupt,

			IRQF_SHARED, "dwc3", dwc->ev_buf);

	if (ret) {

		dev_err(dwc->dev, "failed to request irq #%d --> %d\n",

				irq, ret);

		goto err0;

	}



	spin_lock_irqsave(&dwc->lock, flags);

	if (dwc->gadget_driver) {

		dev_err(dwc->dev, "%s is already bound to %s\n",

				dwc->gadget.name,

				dwc->gadget_driver->driver.name);

		ret = -EBUSY;

		goto err1;

	}



	dwc->gadget_driver	= driver;



	__dwc3_gadget_start(dwc);

	spin_unlock_irqrestore(&dwc->lock, flags);



	return 0;



err1:

	spin_unlock_irqrestore(&dwc->lock, flags);

	free_irq(irq, dwc);



err0:

	return ret;

}



static void __dwc3_gadget_stop(struct dwc3 *dwc)

{

	dwc3_gadget_disable_irq(dwc);

	__dwc3_gadget_ep_disable(dwc->eps[0]);

	__dwc3_gadget_ep_disable(dwc->eps[1]);

}



	dwc->gadget_driver	= NULL;

static int dwc3_gadget_stop(struct usb_gadget *g)

{

	struct dwc3		*dwc = gadget_to_dwc(g);

	unsigned long		flags;

	int			irq;



	spin_lock_irqsave(&dwc->lock, flags);

	__dwc3_gadget_stop(dwc);

	dwc->gadget_driver	= NULL;

	spin_unlock_irqrestore(&dwc->lock, flags);



	irq = platform_get_irq(to_platform_device(dwc->dev), 0);