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Commit 60326ce3 authored by Chao Xie's avatar Chao Xie Committed by Felipe Balbi
Browse files

usb: gadget: mv_udc: add iso support 



In order to support iso, we need do the following things:
1. fix length for one dtd
2. allow req contains multiple packets for a ISO transfer

Signed-off-by: default avatarChao Xie <chao.xie@marvell.com>
Signed-off-by: default avatarYu Xu <yuxu@marvell.com>
Signed-off-by: default avatarNeil Zhang <zhangwm@marvell.com>
Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent 583a7263

drivers/usb/gadget/mv_udc_core.c

+13 −8
Original line number Diff line number Diff line
@@ -355,15 +355,22 @@ static int queue_dtd(struct mv_ep *ep, struct mv_req *req) 
	return retval;

}





static struct mv_dtd *build_dtd(struct mv_req *req, unsigned *length,

		dma_addr_t *dma, int *is_last)

{

	u32 temp;

	struct mv_dtd *dtd;

	struct mv_udc *udc;

	struct mv_dqh *dqh;

	u32 temp, mult = 0;



	/* how big will this transfer be? */

	if (usb_endpoint_xfer_isoc(req->ep->ep.desc)) {

		dqh = req->ep->dqh;

		mult = (dqh->max_packet_length >> EP_QUEUE_HEAD_MULT_POS)

				& 0x3;

		*length = min(req->req.length - req->req.actual,

				(unsigned)(mult * req->ep->ep.maxpacket));

	} else

		*length = min(req->req.length - req->req.actual,

				(unsigned)EP_MAX_LENGTH_TRANSFER);
@@ -407,6 +414,8 @@ static struct mv_dtd *build_dtd(struct mv_req *req, unsigned *length, 
	if (*is_last && !req->req.no_interrupt)

		temp |= DTD_IOC;



	temp |= mult << 10;



	dtd->size_ioc_sts = temp;



	mb();
@@ -718,10 +727,6 @@ mv_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags) 
		dev_err(&udc->dev->dev, "%s, bad ep", __func__);

		return -EINVAL;

	}

	if (ep->ep.desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) {

		if (req->req.length > ep->ep.maxpacket)

			return -EMSGSIZE;

	}



	udc = ep->udc;

	if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)