From: Chao Xie <chao.xie@xxxxxxxxxxx>
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: Chao Xie <chao.xie@xxxxxxxxxxx>
Signed-off-by: Yu Xu <yuxu@xxxxxxxxxxx>
Signed-off-by: Neil Zhang <zhangwm@xxxxxxxxxxx>
---
drivers/usb/gadget/mv_udc_core.c | 21 +++++++++++++--------
1 files changed, 13 insertions(+), 8 deletions(-)
diff --git a/drivers/usb/gadget/mv_udc_core.c b/drivers/usb/gadget/mv_udc_core.c
index 4d3a413..ff6154d 100644
--- a/drivers/usb/gadget/mv_udc_core.c
+++ b/drivers/usb/gadget/mv_udc_core.c
@@ -355,17 +355,24 @@ done:
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? */
- *length = min(req->req.length - req->req.actual,
- (unsigned)EP_MAX_LENGTH_TRANSFER);
+ 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);
udc = req->ep->udc;
@@ -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)
--
1.7.4.1
--
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