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usb: gadget: mv_udc: add iso support

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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@marvell.com>
Signed-off-by: Yu Xu <yuxu@marvell.com>
Signed-off-by: Neil Zhang <zhangwm@marvell.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Chao Xie 2012-07-10 10:07:05 +08:00 committed by Felipe Balbi
parent 583a7263c7
commit 60326ce377
1 changed files with 13 additions and 8 deletions
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17
drivers/usb/gadget/mv_udc_core.c
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@ -355,15 +355,22 @@ 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? */
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)