usb: dwc3: gadget: move dwc3_calc_trbs_left() in place of prototype
Avoid a prototype when the function can be defined earlier. No functional changes, cleanup only. Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
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@ -853,7 +853,53 @@ static void dwc3_gadget_ep_free_request(struct usb_ep *ep,
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kfree(req);
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}
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static u32 dwc3_calc_trbs_left(struct dwc3_ep *dep);
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/**
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* dwc3_ep_prev_trb - returns the previous TRB in the ring
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* @dep: The endpoint with the TRB ring
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* @index: The index of the current TRB in the ring
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*
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* Returns the TRB prior to the one pointed to by the index. If the
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* index is 0, we will wrap backwards, skip the link TRB, and return
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* the one just before that.
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*/
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static struct dwc3_trb *dwc3_ep_prev_trb(struct dwc3_ep *dep, u8 index)
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{
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u8 tmp = index;
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if (!tmp)
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tmp = DWC3_TRB_NUM - 1;
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return &dep->trb_pool[tmp - 1];
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}
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static u32 dwc3_calc_trbs_left(struct dwc3_ep *dep)
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{
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struct dwc3_trb *tmp;
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u8 trbs_left;
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/*
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* If enqueue & dequeue are equal than it is either full or empty.
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*
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* One way to know for sure is if the TRB right before us has HWO bit
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* set or not. If it has, then we're definitely full and can't fit any
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* more transfers in our ring.
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*/
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if (dep->trb_enqueue == dep->trb_dequeue) {
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tmp = dwc3_ep_prev_trb(dep, dep->trb_enqueue);
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if (tmp->ctrl & DWC3_TRB_CTRL_HWO)
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return 0;
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return DWC3_TRB_NUM - 1;
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}
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trbs_left = dep->trb_dequeue - dep->trb_enqueue;
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trbs_left &= (DWC3_TRB_NUM - 1);
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if (dep->trb_dequeue < dep->trb_enqueue)
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trbs_left--;
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return trbs_left;
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}
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static void __dwc3_prepare_one_trb(struct dwc3_ep *dep, struct dwc3_trb *trb,
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dma_addr_t dma, unsigned length, unsigned chain, unsigned node,
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@ -994,54 +1040,6 @@ static void dwc3_prepare_one_trb(struct dwc3_ep *dep,
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stream_id, short_not_ok, no_interrupt);
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}
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/**
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* dwc3_ep_prev_trb - returns the previous TRB in the ring
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* @dep: The endpoint with the TRB ring
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* @index: The index of the current TRB in the ring
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*
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* Returns the TRB prior to the one pointed to by the index. If the
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* index is 0, we will wrap backwards, skip the link TRB, and return
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* the one just before that.
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*/
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static struct dwc3_trb *dwc3_ep_prev_trb(struct dwc3_ep *dep, u8 index)
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{
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u8 tmp = index;
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if (!tmp)
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tmp = DWC3_TRB_NUM - 1;
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return &dep->trb_pool[tmp - 1];
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}
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static u32 dwc3_calc_trbs_left(struct dwc3_ep *dep)
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{
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struct dwc3_trb *tmp;
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u8 trbs_left;
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/*
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* If enqueue & dequeue are equal than it is either full or empty.
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*
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* One way to know for sure is if the TRB right before us has HWO bit
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* set or not. If it has, then we're definitely full and can't fit any
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* more transfers in our ring.
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*/
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if (dep->trb_enqueue == dep->trb_dequeue) {
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tmp = dwc3_ep_prev_trb(dep, dep->trb_enqueue);
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if (tmp->ctrl & DWC3_TRB_CTRL_HWO)
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return 0;
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return DWC3_TRB_NUM - 1;
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}
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trbs_left = dep->trb_dequeue - dep->trb_enqueue;
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trbs_left &= (DWC3_TRB_NUM - 1);
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if (dep->trb_dequeue < dep->trb_enqueue)
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trbs_left--;
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return trbs_left;
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}
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static void dwc3_prepare_one_trb_sg(struct dwc3_ep *dep,
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struct dwc3_request *req)
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{
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