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usb: dwc3: gadget: Report isoc transfer frame number 

Implement the new frame_number API to report the isochronous interval
frame number. This patch checks and reports the interval in which the
isoc transfer was transmitted or received via the Isoc-First TRB SOF
number field.

Signed-off-by: Thinh Nguyen <thinhn@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Thinh Nguyen 2018-11-15 19:03:27 -08:00 committed by Felipe Balbi
parent 6b69753fa0
commit 6abfa0f5bb
2 changed files with 14 additions and 0 deletions
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1
drivers/usb/dwc3/core.h
View File

@ -784,6 +784,7 @@ enum dwc3_link_state {
#define DWC3_TRB_CTRL_ISP_IMI BIT(10)
#define DWC3_TRB_CTRL_IOC BIT(11)
#define DWC3_TRB_CTRL_SID_SOFN(n) (((n) & 0xffff) << 14)
#define DWC3_TRB_CTRL_GET_SID_SOFN(n) (((n) & (0xffff << 14)) >> 14)
#define DWC3_TRBCTL_TYPE(n) ((n) & (0x3f << 4))
#define DWC3_TRBCTL_NORMAL DWC3_TRB_CTRL_TRBCTL(1)

13
drivers/usb/dwc3/gadget.c
View File

@ -2339,6 +2339,19 @@ static int dwc3_gadget_ep_reclaim_completed_trb(struct dwc3_ep *dep,
if (chain && (trb->ctrl & DWC3_TRB_CTRL_HWO))
trb->ctrl &= ~DWC3_TRB_CTRL_HWO;
/*
* For isochronous transfers, the first TRB in a service interval must
* have the Isoc-First type. Track and report its interval frame number.
*/
if (usb_endpoint_xfer_isoc(dep->endpoint.desc) &&
(trb->ctrl & DWC3_TRBCTL_ISOCHRONOUS_FIRST)) {
unsigned int frame_number;
frame_number = DWC3_TRB_CTRL_GET_SID_SOFN(trb->ctrl);
frame_number &= ~(dep->interval - 1);
req->request.frame_number = frame_number;
}
/*
* If we're dealing with unaligned size OUT transfer, we will be left
* with one TRB pending in the ring. We need to manually clear HWO bit