diff options
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/dwc2/gadget.c | 173 |
1 files changed, 124 insertions, 49 deletions
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c index 256c929..61f913d 100644 --- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -523,6 +523,23 @@ static unsigned get_ep_limit(struct dwc2_hsotg_ep *hs_ep) } /** +* dwc2_hsotg_read_frameno - read current frame number +* @hsotg: The device instance +* +* Return the current frame number +*/ +static u32 dwc2_hsotg_read_frameno(struct dwc2_hsotg *hsotg) +{ + u32 dsts; + + dsts = dwc2_readl(hsotg->regs + DSTS); + dsts &= DSTS_SOFFN_MASK; + dsts >>= DSTS_SOFFN_SHIFT; + + return dsts; +} + +/** * dwc2_hsotg_start_req - start a USB request from an endpoint's queue * @hsotg: The controller state. * @hs_ep: The endpoint to process a request for @@ -783,6 +800,30 @@ static void dwc2_hsotg_handle_unaligned_buf_complete(struct dwc2_hsotg *hsotg, hs_req->saved_req_buf = NULL; } +/** + * dwc2_gadget_target_frame_elapsed - Checks target frame + * @hs_ep: The driver endpoint to check + * + * Returns 1 if targeted frame elapsed. If returned 1 then we need to drop + * corresponding transfer. + */ +static bool dwc2_gadget_target_frame_elapsed(struct dwc2_hsotg_ep *hs_ep) +{ + struct dwc2_hsotg *hsotg = hs_ep->parent; + u32 target_frame = hs_ep->target_frame; + u32 current_frame = dwc2_hsotg_read_frameno(hsotg); + bool frame_overrun = hs_ep->frame_overrun; + + if (!frame_overrun && current_frame >= target_frame) + return true; + + if (frame_overrun && current_frame >= target_frame && + ((current_frame - target_frame) < DSTS_SOFFN_LIMIT / 2)) + return true; + + return false; +} + static int dwc2_hsotg_ep_queue(struct usb_ep *ep, struct usb_request *req, gfp_t gfp_flags) { @@ -1641,23 +1682,6 @@ static void dwc2_hsotg_handle_outdone(struct dwc2_hsotg *hsotg, int epnum) } /** - * dwc2_hsotg_read_frameno - read current frame number - * @hsotg: The device instance - * - * Return the current frame number - */ -static u32 dwc2_hsotg_read_frameno(struct dwc2_hsotg *hsotg) -{ - u32 dsts; - - dsts = dwc2_readl(hsotg->regs + DSTS); - dsts &= DSTS_SOFFN_MASK; - dsts >>= DSTS_SOFFN_SHIFT; - - return dsts; -} - -/** * dwc2_hsotg_handle_rx - RX FIFO has data * @hsotg: The device instance * @@ -2571,6 +2595,85 @@ void dwc2_hsotg_core_connect(struct dwc2_hsotg *hsotg) } /** + * dwc2_gadget_handle_incomplete_isoc_in - handle incomplete ISO IN Interrupt. + * @hsotg: The device state: + * + * This interrupt indicates one of the following conditions occurred while + * transmitting an ISOC transaction. + * - Corrupted IN Token for ISOC EP. + * - Packet not complete in FIFO. + * + * The following actions will be taken: + * - Determine the EP + * - Disable EP; when 'Endpoint Disabled' interrupt is received Flush FIFO + */ +static void dwc2_gadget_handle_incomplete_isoc_in(struct dwc2_hsotg *hsotg) +{ + struct dwc2_hsotg_ep *hs_ep; + u32 epctrl; + u32 idx; + + dev_dbg(hsotg->dev, "Incomplete isoc in interrupt received:\n"); + + for (idx = 1; idx <= hsotg->num_of_eps; idx++) { + hs_ep = hsotg->eps_in[idx]; + epctrl = dwc2_readl(hsotg->regs + DIEPCTL(idx)); + if ((epctrl & DXEPCTL_EPENA) && hs_ep->isochronous && + dwc2_gadget_target_frame_elapsed(hs_ep)) { + epctrl |= DXEPCTL_SNAK; + epctrl |= DXEPCTL_EPDIS; + dwc2_writel(epctrl, hsotg->regs + DIEPCTL(idx)); + } + } + + /* Clear interrupt */ + dwc2_writel(GINTSTS_INCOMPL_SOIN, hsotg->regs + GINTSTS); +} + +/** + * dwc2_gadget_handle_incomplete_isoc_out - handle incomplete ISO OUT Interrupt + * @hsotg: The device state: + * + * This interrupt indicates one of the following conditions occurred while + * transmitting an ISOC transaction. + * - Corrupted OUT Token for ISOC EP. + * - Packet not complete in FIFO. + * + * The following actions will be taken: + * - Determine the EP + * - Set DCTL_SGOUTNAK and unmask GOUTNAKEFF if target frame elapsed. + */ +static void dwc2_gadget_handle_incomplete_isoc_out(struct dwc2_hsotg *hsotg) +{ + u32 gintsts; + u32 gintmsk; + u32 epctrl; + struct dwc2_hsotg_ep *hs_ep; + int idx; + + dev_dbg(hsotg->dev, "%s: GINTSTS_INCOMPL_SOOUT\n", __func__); + + for (idx = 1; idx <= hsotg->num_of_eps; idx++) { + hs_ep = hsotg->eps_out[idx]; + epctrl = dwc2_readl(hsotg->regs + DOEPCTL(idx)); + if ((epctrl & DXEPCTL_EPENA) && hs_ep->isochronous && + dwc2_gadget_target_frame_elapsed(hs_ep)) { + /* Unmask GOUTNAKEFF interrupt */ + gintmsk = dwc2_readl(hsotg->regs + GINTMSK); + gintmsk |= GINTSTS_GOUTNAKEFF; + dwc2_writel(gintmsk, hsotg->regs + GINTMSK); + + gintsts = dwc2_readl(hsotg->regs + GINTSTS); + if (!(gintsts & GINTSTS_GOUTNAKEFF)) + __orr32(hsotg->regs + DCTL, DCTL_SGOUTNAK); + } + } + + /* Clear interrupt */ + dwc2_writel(GINTSTS_INCOMPL_SOOUT, hsotg->regs + GINTSTS); +} + +/** * dwc2_hsotg_irq - handle device interrupt * @irq: The IRQ number triggered * @pw: The pw value when registered the handler. @@ -2717,39 +2820,11 @@ irq_retry: dwc2_hsotg_dump(hsotg); } - if (gintsts & GINTSTS_INCOMPL_SOIN) { - u32 idx, epctl_reg; - struct dwc2_hsotg_ep *hs_ep; - - dev_dbg(hsotg->dev, "%s: GINTSTS_INCOMPL_SOIN\n", __func__); - for (idx = 1; idx < hsotg->num_of_eps; idx++) { - hs_ep = hsotg->eps_in[idx]; + if (gintsts & GINTSTS_INCOMPL_SOIN) + dwc2_gadget_handle_incomplete_isoc_in(hsotg); - if (!hs_ep->isochronous || hs_ep->has_correct_parity) - continue; - - epctl_reg = DIEPCTL(idx); - dwc2_hsotg_change_ep_iso_parity(hsotg, epctl_reg); - } - dwc2_writel(GINTSTS_INCOMPL_SOIN, hsotg->regs + GINTSTS); - } - - if (gintsts & GINTSTS_INCOMPL_SOOUT) { - u32 idx, epctl_reg; - struct dwc2_hsotg_ep *hs_ep; - - dev_dbg(hsotg->dev, "%s: GINTSTS_INCOMPL_SOOUT\n", __func__); - for (idx = 1; idx < hsotg->num_of_eps; idx++) { - hs_ep = hsotg->eps_out[idx]; - - if (!hs_ep->isochronous || hs_ep->has_correct_parity) - continue; - - epctl_reg = DOEPCTL(idx); - dwc2_hsotg_change_ep_iso_parity(hsotg, epctl_reg); - } - dwc2_writel(GINTSTS_INCOMPL_SOOUT, hsotg->regs + GINTSTS); - } + if (gintsts & GINTSTS_INCOMPL_SOOUT) + dwc2_gadget_handle_incomplete_isoc_out(hsotg); /* * if we've had fifo events, we should try and go around the |