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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: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Felipe Balbi 2012-04-25 10:45:05 +03:00
parent 7ed6d227c3
commit c12a0d862a
2 changed files with 28 additions and 0 deletions
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2
drivers/usb/dwc3/core.h
View File

@ -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;

26
drivers/usb/dwc3/ep0.c
View File

@ -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);