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usb: dwc3: ep0: preparation for implementing chained TRB

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No functional change. Modified few things so that there are no
code duplication while implementing chained TRB.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Reviewed-by: Lukasz Majewski <l.majewski@samsung.com>
This commit is contained in:
Kishon Vijay Abraham I 2015-02-23 18:40:14 +05:30 committed by Marek Vasut
parent 526a50f8ec
commit 1f78f8feda
1 changed files with 12 additions and 8 deletions
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20
drivers/usb/dwc3/ep0.c
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@ -761,7 +761,10 @@ static void dwc3_ep0_complete_data(struct dwc3 *dwc,
struct usb_request *ur;
struct dwc3_trb *trb;
struct dwc3_ep *ep0;
u32 transferred;
unsigned transfer_size = 0;
unsigned maxp;
void *buf;
u32 transferred = 0;
u32 status;
u32 length;
u8 epnum;
@ -790,18 +793,19 @@ static void dwc3_ep0_complete_data(struct dwc3 *dwc,
}
ur = &r->request;
buf = ur->buf;
length = trb->size & DWC3_TRB_SIZE_MASK;
if (dwc->ep0_bounced) {
unsigned transfer_size = ur->length;
unsigned maxp = ep0->endpoint.maxpacket;
maxp = ep0->endpoint.maxpacket;
transfer_size += (maxp - (transfer_size % maxp));
transferred = min_t(u32, ur->length,
transfer_size - length);
if (dwc->ep0_bounced) {
transfer_size = roundup((ur->length - transfer_size),
maxp);
transferred = min_t(u32, ur->length - transferred,
transfer_size - length);
dwc3_flush_cache((int)dwc->ep0_bounce, DWC3_EP0_BOUNCE_SIZE);
memcpy(ur->buf, dwc->ep0_bounce, transferred);
memcpy(buf, dwc->ep0_bounce, transferred);
} else {
transferred = ur->length - length;
}