From 60326ce377090541db9ba1a05a041316ab5b46ec Mon Sep 17 00:00:00 2001 From: Chao Xie Date: Tue, 10 Jul 2012 10:07:05 +0800 Subject: [PATCH] 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: Chao Xie Signed-off-by: Yu Xu Signed-off-by: Neil Zhang Signed-off-by: Felipe Balbi --- drivers/usb/gadget/mv_udc_core.c | 21 +++++++++++++-------- 1 file changed, 13 insertions(+), 8 deletions(-) diff --git a/drivers/usb/gadget/mv_udc_core.c b/drivers/usb/gadget/mv_udc_core.c index 4d3a4136b376..ff6154d1816e 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) -- 2.30.2