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Commit c12a0d86 authored by Felipe Balbi's avatar Felipe Balbi
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usb: dwc3: ep0: implement support for Set Isoch Delay request 



This is basically a noop for DWC3. We don't have
to do anything. Basically we test if the request
parameters are correct, cache the Isochronous
Delay and return success.

Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent 7ed6d227

drivers/usb/dwc3/core.h

+2 −0
Original line number Diff line number Diff line
@@ -575,6 +575,7 @@ struct dwc3_request { 
 * @setup_packet_pending: true when there's a Setup Packet in FIFO. Workaround

 * @needs_fifo_resize: not all users might want fifo resizing, flag it

 * @resize_fifos: tells us it's ok to reconfigure our TxFIFO sizes.

 * @isoch_delay: wValue from Set Isochronous Delay request;

 * @u2sel: parameter from Set SEL request.

 * @u2pel: parameter from Set SEL request.

 * @u1sel: parameter from Set SEL request.
@@ -645,6 +646,7 @@ struct dwc3 { 
	enum dwc3_link_state	link_state;

	enum dwc3_device_state	dev_state;



	u16			isoch_delay;

	u16			u2sel;

	u16			u2pel;

	u8			u1sel;

drivers/usb/dwc3/ep0.c

+26 −0
Original line number Diff line number Diff line
@@ -569,6 +569,28 @@ static int dwc3_ep0_set_sel(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl) 
	return __dwc3_gadget_ep0_queue(dep, &dwc->ep0_usb_req);

}



static int dwc3_ep0_set_isoch_delay(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl)

{

	u16		wLength;

	u16		wValue;

	u16		wIndex;



	wValue = le16_to_cpu(ctrl->wValue);

	wLength = le16_to_cpu(ctrl->wLength);

	wIndex = le16_to_cpu(ctrl->wIndex);



	if (wIndex || wLength)

		return -EINVAL;



	/*

	 * REVISIT It's unclear from Databook what to do with this

	 * value. For now, just cache it.

	 */

	dwc->isoch_delay = wValue;



	return 0;

}



static int dwc3_ep0_std_request(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl)

{

	int ret;
@@ -598,6 +620,10 @@ static int dwc3_ep0_std_request(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl) 
		dev_vdbg(dwc->dev, "USB_REQ_SET_SEL\n");

		ret = dwc3_ep0_set_sel(dwc, ctrl);

		break;

	case USB_REQ_SET_ISOCH_DELAY:

		dev_vdbg(dwc->dev, "USB_REQ_SET_ISOCH_DELAY\n");

		ret = dwc3_ep0_set_isoch_delay(dwc, ctrl);

		break;

	default:

		dev_vdbg(dwc->dev, "Forwarding to gadget driver\n");

		ret = dwc3_ep0_delegate_req(dwc, ctrl);