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-rw-r--r--drivers/usb/dwc2/core.h5
-rw-r--r--drivers/usb/dwc2/gadget.c19
2 files changed, 24 insertions, 0 deletions
diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
index dec0b21fc626..55160992b181 100644
--- a/drivers/usb/dwc2/core.h
+++ b/drivers/usb/dwc2/core.h
@@ -177,6 +177,8 @@ struct dwc2_hsotg_req;
* @fifo_load: The amount of data loaded into the FIFO (periodic IN)
* @last_load: The offset of data for the last start of request.
* @size_loaded: The last loaded size for DxEPTSIZE for periodic IN
+ * @target_frame: Targeted frame num to setup next ISOC transfer
+ * @frame_overrun: Indicates SOF number overrun in DSTS
*
* This is the driver's state for each registered enpoint, allowing it
* to keep track of transactions that need doing. Each endpoint has a
@@ -214,6 +216,9 @@ struct dwc2_hsotg_ep {
unsigned int isochronous:1;
unsigned int send_zlp:1;
unsigned int has_correct_parity:1;
+ unsigned int target_frame;
+#define TARGET_FRAME_INITIAL 0xFFFFFFFF
+ bool frame_overrun;
char name[10];
};
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index 54d242b6d2aa..b8f3661771f0 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -97,6 +97,25 @@ static inline bool using_dma(struct dwc2_hsotg *hsotg)
}
/**
+ * dwc2_gadget_incr_frame_num - Increments the targeted frame number.
+ * @hs_ep: The endpoint
+ * @increment: The value to increment by
+ *
+ * This function will also check if the frame number overruns DSTS_SOFFN_LIMIT.
+ * If an overrun occurs it will wrap the value and set the frame_overrun flag.
+ */
+static inline void dwc2_gadget_incr_frame_num(struct dwc2_hsotg_ep *hs_ep)
+{
+ hs_ep->target_frame += hs_ep->interval;
+ if (hs_ep->target_frame > DSTS_SOFFN_LIMIT) {
+ hs_ep->frame_overrun = 1;
+ hs_ep->target_frame &= DSTS_SOFFN_LIMIT;
+ } else {
+ hs_ep->frame_overrun = 0;
+ }
+}
+
+/**
* dwc2_hsotg_en_gsint - enable one or more of the general interrupt
* @hsotg: The device state
* @ints: A bitmask of the interrupts to enable