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: Felipe Balbi <balbi@ti.com>
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@ -575,6 +575,7 @@ struct dwc3_request {
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* @setup_packet_pending: true when there's a Setup Packet in FIFO. Workaround
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* @needs_fifo_resize: not all users might want fifo resizing, flag it
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* @resize_fifos: tells us it's ok to reconfigure our TxFIFO sizes.
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* @isoch_delay: wValue from Set Isochronous Delay request;
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* @u2sel: parameter from Set SEL request.
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* @u2pel: parameter from Set SEL request.
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* @u1sel: parameter from Set SEL request.
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@ -645,6 +646,7 @@ struct dwc3 {
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enum dwc3_link_state link_state;
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enum dwc3_device_state dev_state;
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u16 isoch_delay;
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u16 u2sel;
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u16 u2pel;
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u8 u1sel;
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@ -569,6 +569,28 @@ static int dwc3_ep0_set_sel(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl)
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return __dwc3_gadget_ep0_queue(dep, &dwc->ep0_usb_req);
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}
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static int dwc3_ep0_set_isoch_delay(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl)
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{
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u16 wLength;
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u16 wValue;
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u16 wIndex;
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wValue = le16_to_cpu(ctrl->wValue);
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wLength = le16_to_cpu(ctrl->wLength);
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wIndex = le16_to_cpu(ctrl->wIndex);
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if (wIndex || wLength)
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return -EINVAL;
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/*
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* REVISIT It's unclear from Databook what to do with this
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* value. For now, just cache it.
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*/
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dwc->isoch_delay = wValue;
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return 0;
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}
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static int dwc3_ep0_std_request(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl)
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{
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int ret;
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@ -598,6 +620,10 @@ static int dwc3_ep0_std_request(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl)
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dev_vdbg(dwc->dev, "USB_REQ_SET_SEL\n");
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ret = dwc3_ep0_set_sel(dwc, ctrl);
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break;
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case USB_REQ_SET_ISOCH_DELAY:
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dev_vdbg(dwc->dev, "USB_REQ_SET_ISOCH_DELAY\n");
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ret = dwc3_ep0_set_isoch_delay(dwc, ctrl);
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break;
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default:
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dev_vdbg(dwc->dev, "Forwarding to gadget driver\n");
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ret = dwc3_ep0_delegate_req(dwc, ctrl);
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